The 328i Sedan and Sports Wagon and the all-wheel drive 328xi Sedan and Sports Wagon, are powered by BMW's 3.0-liter inline 6-cylinder with aluminum/magnesium engine block, producing 230 horsepower and 200 lb-ft of torque; a 15 hp and 15 lb-ft of torque improvement over the previous models.
The 335i and 335xi Sedans obtain their motivation from the 3.0-liter twin-turbocharged inline 6-cylinder engine with a cast aluminum engine block producing 300 horsepower and 300lb-ft of torque. This is a 45 hp and 80 lb-ft of torque improvement over the 2006 330i models.
The increase in horsepower and torque on both of these engines is not offset by a decrease in fuel efficiency. The new engines have similar fuel economy as the already impressive 2007 3 Series Sedans and Sports Wagons.
Drivers may specify the standard-equipment 6-speed manual transmission or the optional 6-speed STEPTRONIC automatic transmission. The 335i/xi gear ratios have been optimized to work with the new twin-turbocharged engine. The 335i and 335xi Sedans have steering wheel-mounted paddle shifters when ordered with the optional Sport Package and the 6-speed STEPTRONIC automatic transmission.
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