Z4 sDrive28i - Car and Driver (blog)
The base 2. 0-liter four-cylinder sDrive28i is offered with either a six-speed manual or eight-speed automatic. there are two 3. 0-liter twin-turbo sixes: the 300-hp sDrive35i and the 335-hp sDrive35is. The former is offered with a six-speed stick or seven-speed dual-clutch auto, while the sDrive35is is offered only with the automatic. First Drive Review – 2012 BMW Z4 sDrive28i Any new engine is big news to us, but when a new powerplant comes along and replaces one of our favorite engines—BMW’s naturally aspirated inline-six, in this case—we pay extra-close attention. Instead, the Z4 sDrive28i and the 528i will have a new turbocharged 2. 0-liter four-cylinder implanted between their front fenders. BMW claims the turbocharged 2. 0-liter makes 240 hp at 6500 rpm and 260 lb-ft of torque at a low 1250 rpm. Compared with the naturally aspirated six of the 2011 Z4, the new engine comes up short by 15 horses but bests it by 40 lb-ft. Given that it has two fewer cylinders, it’s also shorter, and the majority of the engine’s mass sits behind the front-axle line. Boosted Engine, Elevated Aggression. The engine isn’t rough, but there is a slight coarseness from the engine and exhaust under stress. Whereas BMW’s other boosted engines keep their turbo whine to a minimum, as if they were embarrassed by it, step into the boost in the Z4, and the turbocharger whistles proudly. Source: www.caranddriver.com
