But the reality is that an in-line engine like this simply purrs more smoothly than V-shaped motors, and it revs just as freely as anything Honda has ever produced.

FORBES: Test Drives

This is the first year for the 6-series with the N55 engine, the twin-scroll turbo, 3.0-liter in-line six that so admirably muscles the 335i around.

WSJ: 2012 BMW 640i Review: For the All-Business Person in a Hurry | Rumble Seat by Dan Neil