Acceleration

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
6	7	6.2

The 6-cyl provides brisk takeoffs, adequate passing power. The V8 feels measurably stronger on both counts.

Fuel Economy

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
4	3	3.4

Depending on driving conditions, we've averaged 12.1-17.4 mpg in tests of 6-cyl versions of these GM models. We have not yet tested a V8 Rainier with Active Fuel Management, but note that EPA estimates match those of the 6-cyl. Both engines use regular-grade fuel.

Ride Quality

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
6	6	5.5

Standard air-spring rear suspension provides firm control without the unwanted bounce of the rear coil springs in related GM SUVs. Still, sharp bumps can cause Rainier's tail to jolt or hop.

Steering/Handling/Braking

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
4	4	5.7

Rainier is generally more poised than its 5-seat relatives with rear coil springs. But it's still typical truck-type SUV, with a slight wobbly feel in quick direction changes and mediocre cornering grip compared to a car. Steering too light for stress-free control, though response is slightly sharper than its GM siblings. Rainier and Saab's 9-7X are the only members of this family offering all-wheel drive without low-range gearing.

Quietness

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
6	7	6.6

Buick's SUV has more sound insulation than its Chevy/GMC/Isuzu cousins. Rainier has noticeably less wind and road noise than most truck-type SUVs. Unlike the V8, the 6-cyl engine sounds gruff at full throttle.

Controls

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
7	7	6.6

Most controls are clear and handy, though adjusting low-mounted climate system demands a long look from road. Available navigation system controls audio functions, but is fairly easy to use overall. Interior materials and assembly fall short of mark set by similarly priced SUVs from Acura, Lexus, and Volkswagen.

Room/Comfort/Driver Seating (front)

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
7	7	7.5

Fine head, leg room. Seat comfort OK, but firmer cushions would give better support. Headrests, thick roof pillars interfere with some over-the-shoulder and aft sightlines. Modest step-in height. Available power-adjustable pedals may be helpful to shorter drivers.

Room/Comfort (rear)

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
6	6	6.3

Good head and knee room, plus adequate under-seat foot space despite uneven floorboard. Split bench seat comfortable, fairly supportive, wide enough for three friendly adults.

Cargo Room

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
9	9	7.9

OK with rear seatback in place, generous with it folded. Seatback split 60/40, folds easily with help from automatic-folding headrests. High opening to liftgate glass hampers loading or unloading without using full liftgate. Nice array of small-item storage space in cabin.

Value within Class

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
4	4	5.8

Buick positions Rainier as more luxurious than the Chevrolet, GMC, and Isuzu SUVs that share its basic design. It is the quietest and best riding of the bunch. Still, Rainier costs more than the others and can't escape the faults common to their truck-type design: indifferent handling and mediocre fuel economy.

Total Score

AWD CXL, 6-cyl	AWD CXL, V8	Class Average
59	60	61.5

Scores for all Premium Midsize Sport-utility Vehicles

Low Score		52
Average Score		61
High Score		73