AC Schnitzer have done to the 135i what they do best, they’ve tuned the car to deliver a performance to rival the M3. Modifications to the engine of the 135i take the output from the twin-turbo straight-six engine to a cool 335bhp with 332 lb-ft of torque.

The tuned engine can take the car from zero to 62mph in under 5 seconds and flaunts a top speed of 186mph. Tuners have also added a sports suspension, an additional strut brace, rear wing roof spoiler and 19-inch alloys. AC Schnitzer is also offering diesel upgrades that will increase the power of the diesel engine by 30bhp.

[Source: AutoCar]