this year, we reported that BMW's normally aspirated inline-6 engines will
be ushered out and replaced by a new family of turbocharged four-cylinder
engines. BMW today
confirmed that four-cylinder power would return to U.S.-bound BMWs after a
10+ year absence.
The first model to get BMW's new 2.0-liter
TwinPower Turbo four-cylinder engine will be the Z4 sDrive28i Roadster (say
that five times fast). The engine develops 240 hp and 260 lb-ft of torque (30
percent more torque at 1,500 fewer RPMs than the naturally aspirated 3.0-liter
BMW says that the new turbo four will be 20
percent more fuel efficient than the inline-6 when paired with the 8-speed
automatic transmission. We're sure that there are fuel efficiency gains to be
made with the 6-speed manual transmission as well, but it's likely nowhere near
20 percent (or else BMW would have mentioned it in the press release).
The Z4 sDrive28i Roadster will arrive in showrooms this fall, and
the turbo four will likely filter down to other BMW models soon after.
quote: Maximum output of 240 horsepower is achieved at 5,000 rpm, 1,500 rpm lower than in the normally-aspirated 3.0-liter inline six. The peak torque of 260 lb-ft comes on stream at just 1,250 rpm.
quote: I hope you can still cruise off-boost though, as that to me is the key reason for turbo power over normal aspiration.
quote: Average joes can't afford BMWs, this is a richman's car.
quote: this motor looks to be an order of magnitude better.