Inside Line set out on a “cross-country test bash [to see the] defining differences between the 2008 BMW 135i, 2008 BMW 335i and [their] long-term 2002 BMW M3.” Video after the break. Click here for first picture in gallery.

It’s in these details that we realize how far BMW has come between its E46 and more recent E87 and E90 platforms. It’s here that we find ourselves in awe of the new 3.0-liter turbo engine’s ability to be turbine smooth and locomotive powerful.

[via Edmunds]