Nissan's compact sedan got a major restyling for 1998, adopting a harder-edge appearance, in contrast to the rounded look of its predecessor. Slightly larger in size, though on the same wheelbase as before, Altima also got a mildly revised powertrain and suspension. Overall length grew by 2.6 inches, width and track by about 2 inches. Head and leg room also grew a bit. Four models were available: base XE, volume-selling GXE, sporty SE, and luxury GLE. A firmer suspension went into the SE, which also got standard alloy wheels, wider tires, rear disc brakes (instead of the usual drums), and a body-colored rear spoiler. The GLE included leather upholstery and a power driver's seat. All models used the same 2.4-liter dual-overhead-cam 4-cylinder engine, producing 150 horsepower and mated to a standard 5-speed manual or optional 4-speed automatic transmission. Internal engine changes aimed to improve low-speed power delivery, and the automatic transmission was reprogrammed for smoother operation. Antilock brakes were an option. Nissan claimed a 20 percent increase in structural stiffness. Altima had been the company's best-selling U.S. model, fighting in the tight compact family sedan market. Rivals to the restyled edition included the Ford Contour, Mazda 626, and Mitsubishi Galant.