BMW's venerable N54 twin-turbocharged 3.0-liter inline six-cylinder engine is one of the most-loved of the Ultimate Driving Machine's current crop (the M Division's twin-turbo 4.4-liter V-8 being ...
BMW claims this year's 135i, when fitted with a double-clutch transmission (DCT), will reach 60 mph in 5.0 seconds, while the convertible takes 0.3 seconds longer. The last six-speed 135i we tested ...