BMW 2011 (135i)

1-SERIES: 135i models get a new single-turbo 3-liter engine in place of last year's twin-turbo. The new engine has the same 300 hp/300 lb-ft output, but BMW says it is more responsive, fuel-efficient and cleaner than the outgoing engine. The 135i's optional automatic is now a 7-speed dual-clutch gearbox; the 128i retains last year's conventional 6-speed automatic.