The Z4 is now offered in three different models: the Z4 sDrive28i, which comes with a 255-horsepower, 2.0L 4-cylinder engine; the Z4 sDrive35i, powered by a 300-hp, 3.0L turbocharged six; and the sDrive35is, which gets a high-performance 335-hp turbo six.
Each of these powertrains delivers satisfying performance with the standard 6-speed manual transmission--including a linkage that's still among the best in the business--but the 7-speed dual-clutch (DCT) gearbox in the sDrive35i is a significant step above the 6-speed automatic that's offered in the base model. The DCT shifts very quickly, matches revs for downshifts, and does a great job of maintaining a smooth flow of power. Acceleration from zero to 60 mph happens in just 5.0 seconds with the DCT, while top speed with the available Sport Package is 150 mph.
Each of these powertrains delivers satisfying performance with the standard 6-speed manual transmission--including a linkage that's still among the best in the business--but the 7-speed dual-clutch (DCT) gearbox in the sDrive35i is a significant step above the 6-speed automatic that's offered in the base model. The DCT shifts very quickly, matches revs for downshifts, and does a great job of maintaining a smooth flow of power. Acceleration from zero to 60 mph happens in just 5.0 seconds with the DCT, while top speed with the available Sport Package is 150 mph.
