Cars with names such as Corvette, Viper, XK, and 911 evoke quite a reaction when mentioned in conversation or seen on the street. These are the types of vehicles that nobody really needs, but everyone wants. Indeed, such premium sporty/performance cars are the very definition of the category.

The cars that Consumer Guide classifies as premium sporty/performance are at the top of the mountain when it comes to acceleration, handling response, and of course, price. From there, these cars diversify in their missions. Some are pure thrill machines, designed for maximum go with less thought given to passenger comfort. Others are more serene, offering more balanced combinations of performance and luxury.

Depending on your preferences, and how much discretionary income you have, premium sporty/performance cars offer driving experiences quite unlike anything else on the road. Consumer Guide identifies 16 vehicles in this class. New or recently redesigned for 2007 are the Jaguar XK Series, Mercedes-Benz SL-Class, and Volkswagen Eos. The Audi TT and Dodge Viper skip the 2007 model year, but both will return in calendar '07 as 2008 models.

Muscle Bound
American-made premium sporty/performance cars are typically about three things: horsepower, horsepower, and horsepower. Raw Detroit iron holds a special appeal among enthusiasts. Give them big, pushrod V8 or V10 engines (none of this overhead camshaft or four valve-per-cylinder stuff), brutally stiff suspensions, and exhaust notes that will frighten lesser cars off the road.

Premium Sporty/Performance Car Facts
- The Mercedes-Benz SL65's turbocharged V12 engine produces 738 lb-ft of torque, which is more than the combined torque ratings of the Chevrolet Aveo, Honda Fit, Kia Rio, Nissan Versa, Suzuki Reno, and Toyota Yaris.

- The Porsche 911 Carrera GT3 has a 415-horsepower six-cylinder engine. It produces that power from a displacement of only 3.6 liters without the assistance of a turbocharger or supercharger.

- The Cadillac XLR is available in a high-performance V model, with a supercharged V8 engine. Its $100,000 price tag makes it the first production Cadillac to carry a six-figure sticker.

No two vehicles exemplify these traits more than the iconic Chevrolet Corvette and Dodge Viper. The former is one of America's original sports car, the latter is an auto show concept brought to life, a vehicle that put Dodge back in the design spotlight.

The "base" Corvette pumps out 400 horsepower from its 6.0-liter V8 engine. With an estimated 0-60 mph acceleration time of 4.5 seconds and a starting price of less than $45,000, Corvette is a high-performance bargain in this segment. These virtues, combined with excellent handling and surprising utility make this Chevy a Consumer Guide Best Buy.

For those who really feel the need for speed, Chevy offers the 505-horsepower Corvette Z06. According to Chevy, this super Corvette is capable of running from 0-60 mph in 3.7 seconds. That puts it among the fastest production vehicles in the world, and in the territory of six-figure price tag cars. The Z06 starts at $64,890.

Maybe the Corvette is too subtle. If that's your view, then Viper's your baby. Instantly recognizable and totally off the wall, this sports car is nearly as exotic as those famous Italian cars that have horses and bulls as their insignias. Dodge skipped model-year 2007 for Viper. At the 2007 Detroit Auto Show, Dodge unveiled a restyled 2008 model. The company made this snake more deadly by increasing the standard V10 engine's displacement to 8.4 liters from 8.1 liters. Horsepower goes up accordingly, to 600 from 510. Dodge says the '08 Viper will accelerate from 0-60 mph in less than four seconds. Coupe and convertible body styles will return.

Grand Touring
If all-out power isn't your thing, there are premium sporty/performance cars that offer more subtle packages. The Cadillac XLR, Chrysler Crossfire, Jaguar XK, Lexus SC 430, and Volvo C70 offer more serene driving experiences while sacrificing little in the way of performance.

The Crossfire and XK are available as hardtop coupes and fabric top convertibles. The XLR, SC 430, and C70 are convertibles equipped with retractable hardtops. The hardtops are a boon for those who live in wet or snowy climates, though in Consumer Guide testing, we have not experienced any leaks with the soft-top models.

SC 430, XK, and XLR use V8 engines. Crossfire uses a V6, and C70 has a turbocharged five cylinder. Crossfire and C70 offer a choice of manual or automatic transmission. All others have a six-speed automatic.

XLR shares some of its basic architecture and is built in the same plant as the Corvette, though the two have different styling, powertrains, and pricing. Crossfire owes much of its engineering to former corporate partner Mercedes-Benz. C70 borrows its underskin design from Volvo's S40 sedans and V50 wagons. The Volvo is also the only entry among these cars with front-wheel drive.

Jaguar's redesigned XK abandons its steel body for an all-aluminum frame. It weighs about 300 lb less than 1997-2006 models. Both the coupe and convertible exhibit strong acceleration, balanced handling, and inviting accommodations for two, at prices that typically undercut comparable German rivals. This British cat earned Consumer Guide's Recommended award.

No matter which one you might choose, you are almost guaranteed exclusivity. These cars are among the flagship models offered by their respective manufacturers. As such, they don't sell very many of them. Consider that Toyota can sell more Camrys in two months than all these cars combined can sell in one year. Then again, you're not likely to get the looks in a Camry than you would in any of these sportsters.

German Delights
If any automakers know about defining premium sporty/performance cars, it's those from Germany. BMW, Mercedes-Benz, and Porsche all offer models targeting well-heeled shoppers who want these cars' near-perfect combinations of style, performance, and luxury.

BMW offers several premium sporty/performance cars across a broad range of prices. Available are the two-passenger Z4 coupes and convertibles. All these cars use inline six-cylinder engines, ranging from 215 horsepower in the base 3.0i convertible, to 330 horsepower in the Z4 M coupe and convertible. Any model excels for sporty fun, and that's why it's a Consumer Guide Best Buy.

Also available as a coupe or convertible is the larger BMW 6-Series. The "base" 650i has a 360-horsepower, 4.8-liter V8 engine. These models have a choice of three six-speed transmissions, a manual, automatic, and BMW's Sequential Manual Gearbox (SMG). The SMG is basically a manual transmission without a clutch pedal. Shifting is done via a floorshifter or steering wheel paddles. It can also be set to shift like an automatic. If 360 horsepower isn't enough, there's the M6. It has a 500-horsepower V10 engine that teams with a seven-speed SMG.

Elsewhere in Germany, Mercedes-Benz has its own lineup of premium sporty/performance cars. They also make coupes and convertibles, with the latter all using power-folding hardtops. "Base" models are part of the SLK-Class, which are two-passenger convertibles. Stepping up to the CLK-Class gives you a back seat and the option of a hardtop coupe.

SLK models are the V6-powered SLK280 and SLK350, as well as the V8 SLK55, tuned by Mercedes' AMG performance division. The CLK offers the 286-horsepower V6 engine in the base CLK350. The uplevel CLK550 has a 382-horsepower V8. Also tuned by AMG, the CLK63 has a 475-horsepower V8. It's available as a convertible only.

At the top of Mercedes' premium sporty/performance car food chain is the SL-Class. All SLs are two-passenger convertibles. The roster includes the SL550 with a 382-horsepower V8 engine and SL600 with a 510-horsepower turbocharged V12. When AMG gets its hands on an SL, the outcomes are a pair of powerhouses: the supercharged 510-horsepower V8 SL55 and turbocharged 604-horsepower V12 S65. The latter is the most expensive car listed in the Consumer Guide database, with a suggested retail price of $186,000.

Finally, no list of premium sporty/performance cars would be complete without mentioning Porsche. These are some halo vehicles that more than a few people aspire to own.

None of Porsche's cars (the Cayenne SUV doesn't count) have their engines in the front. The Boxster convertible and Cayman coupe are mid-engine. The storied 911's engine goes back further still, all the way to the rear, making the driving experience something few cars, even in this class, can match. For 2007, Porsche revives its glass-roof 911 Targa model.

Boxster, Cayman, and 911 use horizontally opposed 6-cylinder engines, ranging from 245 to 480 horsepower. All have rear-wheel drive, and 911s are available with all-wheel drive. They're available with a special "Sport Chrono" option package that includes a button to adjust engine and chassis controls for high-performance driving. Optional on all 911 models and Boxster and Cayman S models are ceramic composite brakes. They cost more than $8,000, but offer the advantage of high heat resistance and a life expectancy of 300,000 km (186,411 mi).

Adding options makes these pricey cars even more expensive than they already are. Loaded Caymans can easily top $70,000, and the top-line 911 Turbo can exceed $130,000. Very few cars of any stripe, however, have the cachet of the Porsche name, and that means these models should retain a lot of their value at trade-in time. Boxster and Cayman are about as much fun to drive as a 911 but don't cost nearly as much, making them Consumer Guide Recommended picks.


BMW 6-Series
BMW 6-Series
Base Price Range: $73,900-$104,400
EPA MPG Range: 12-25
Body Styles: 2-door coupe, 2-door convertible

The 6-Series suffers the usual coupe/convertible compromises, daunting prices, a ride that seems firmer than necessary, and BMW's confounding iDrive control. Still, any model is a luxurious driving treat: swift, supremely capable, and very refined. But avoid the aggravating SMT transmission.

BMW Z4
BMW Z4
Base Price Range: $36,400-$52,100
EPA MPG Range: 16-30
Body Style: 2-door convertible
The M convertible and coupe are the only 2007 Z4s made available for full test so far. They're racetrack able, yet also reasonably practical daily drivers for well-heeled enthusiasts. Other Z4s have slightly less-thrilling performance, but are no less rewarding to drive, cost less than the M, and deliver better fuel economy. Thus, the 3.0i and 3.0si best reflect our Best Buy accolades for this sports car.

Cadillac XLR
Cadillac XLR
Base Price Range: $78,080-$97,460
EPA MPG Range: 15-25
Body Style: 2-door convertible
Priced between the less expensive Lexus SC 430 and costlier Mercedes-Benz SL, XLR need make no apology for features and performance. The XLR-V is a genuine high-performance machine, even if it doesn't quite feel like a $100,000 car. Cadillac's challenge is to convince well-heeled shoppers that any XLR is in the same league as its prestigious competition.

Chevrolet Corvette
Chevrolet Corvette
Base Price Range: $44,170-$69,175
EPA MPG Range: 16-28
Body Styles: 2-door hatchback, 2-door convertible
The Best Buy Corvette is fast fun. Base models are reasonably practical daily drivers that cost thousands less than rival sports cars with similar performance. That also goes for the 505-hp Z06 version, which is among the fastest cars in the world. Don't order the stiff-riding Z51 option before test driving it on a bumpy surface, however.

Chrysler Crossfire
Chrysler Crossfire
Base Price Range: $29,045-$49,120
EPA MPG Range: 17-28
Body Styles: 2-door hatchback, 2-door convertible
Crossfire is not as well built as the higher-priced BMW Z4 or Mercedes-Benz SLK, and doesn't offer the value of the less expensive Mazda MX-5. It is best considered a high-style sporty cruiser. Our favorite is the convertible: It delivers open-air fun with a comfortable ride.

Jaguar XK
Jaguar XK
Base Price Range: $74,835-$91,835
EPA MPG Range: 17-27
Body Styles: 2-door coupe, 2-door convertible
An enticing blend of grown-up performance and sporty luxury earns the XK Recommended status. XKR adds even more performance and sharper handling. Rivals such as the Mercedes-Benz SL and Cadillac XLR offer the security of a power metal retractable roof, but the XK convertible's fabric top is well insulated and consumes less cargo room when folded. Price-wise, Jaguar's base XKs slot attractively between comparable versions of the BMW 6-Series and the Mercedes SL550, while XKRs are significantly cheaper than an M6 or SL55.

Lexus SC 430
Lexus SC 430
Base Price: $65,455
EPA MPG Range: 19-25
Body Style: 2-door convertible
SC 430 is a posh, pleasant, semisporting convertible with the extra security and convenience of a power metal roof, plus Lexus' highly rated customer service, workmanship, and reliability. It isn't cheap, but some rivals with similar power and features cost even more.

Mercedes-Benz CLK-Class
Mercedes-Benz CLK-Class
Base Price Range: $46,200-$89,200
EPA MPG Range: 13-28
Body Styles: 2-door coupe, 2-door convertible
We have not yet tested a 2007 Mercedes-Benz CLK.

Mercedes-Benz SL-Class
Mercedes-Benz SL-Class
Base Price Range: $94,800-$186,000
EPA MPG Range: 13-22
Body Style: 2-door convertible
SLs are intriguingly engineered, solidly built, impeccably finished, and a pleasure to drive. Their style and cachet should stay fresh for years, boosting long-term resale values and taking some sting out of startling sticker prices.

Mercedes-Benz SLK-Class
Mercedes-Benz SLK-Class
Base Price Range: $43,350-$62,500
EPA MPG Range: 16-27
Body Style: 2-door convertible
It may not be the first nameplate mentioned when talk turns to sports cars, but the SLK has enough accessible everyday performance to hold its own in pretty fast company. Of broader appeal is its blend of open-air excitement, hardtop security, solid engineering, and Mercedes-Benz prestige.

Porsche 911
Porsche 911
Base Price Range: $72,400-$122,900
EPA MPG Range: 17-26
Body Styles: 2-door coupe, 2-door convertible
Desirable simply as a unique high-performance driving experience, 911s also offer surprising utility. You pay plenty, but that's partly offset by solid construction and very strong resale values.

Porsche Boxster and Cayman
Porsche Boxster and Cayman
Base Price Range: $45,600-$58,900
EPA MPG Range: 18-29
Body Styles: 2-door hatchback, 2-door convertible
Some less-expensive sports cars challenge Boxster and Cayman on a fun-per-dollar basis, and some like-priced competitors deliver more outright power. Few, however, match this Recommended duo's range of strengths: road manners and mechanical sophistication to satisfy the most discriminating driver, a good dose of everyday usability, and the cachet of the Porsche name.

Volkswagen Eos
Volkswagen Eos
Base Price: $28,110-$36,970
EPA MPG Range: 23-32
Body Style: 2-door convertible
Eos's strengths are a comfortable ride, fine handling, and the choice of open-air driving or hardtop security. Its weaknesses include a tight rear seat and minimal cargo room. Overall, Eos bests its two main retractable-hardtop convertible competitors: It starts at around $8000 less than the Volvo C70 but delivers comparable performance, and it's more solid and fun to drive than the similarly priced Chrysler Sebring and Pontiac G6 convertibles.

Volvo C70
Volvo C70
Base Price: $39,090
EPA MPG Range: 20-29
Body Style: 2-door convertible
It's a step below most like-priced convertibles for all-around performance, but the C70 is a pleasant, stylish, well-built blend of top-down fun and fixed-roof security. A comfortable ride and decent trunk space add to its appeal.