The Bavarian brothers from the house of BMW battle to claim supremacy in "Sibling Rivalry." Watch as Craig Stanton pushes each car to their limits as we find out which prevails - stock or not.
Just for your info, the test b/w Stage III Dinan 335i and the stock E92 M3 took place at Willow Springs Raceway.
The BMW 335i comes with a tweaked ECU, twin-turbo'd 3.0-liter inline-six. Dinan announced its Stage 3 package which includes a fully-adjustable suspension and a handful of engine mods that bring output up to 406 hp and a 460 lb.-ft. of torque at 4,300 RPM. This gives Dinan 335i an advantage of better torque and low curb-weight but you just can't ignore the power of M3.
To upgrade the Bimmer to Dinan Stage 3 specs cost about $14,000. Compare this to $56,500 for new M3 and you solve the puzzle. But if you don't like puzzles then just forget everything and enjoy the video.