MTM’s diesel-powered Audi A5 3.0 V6 TDI (dubbed Thunderbolt) hides some serious punch under its relatively discreet looks. The German tuner enhanced the 3.0-liter turbo-diesel unit’s output from 240 HP to 292 HP and torque from 500Nm to 550Nm through a full 3D software revision that optimizes the engine map.

If your ears are up to the challenge, MTM’s 4-pipe rear muffler can boost power to 300 HP. Even though that’s still 54 HP less than the Audi S5, MTM supports that independently tested at Hockenheim, the supped up A5 3.0 V6 TDI cut the S5’s lap time at the Hockenheim race-track by a clear second. -Continued after the jump

In terms of performance, the MTM-tuned A5 diesel sprints from 0 to 100km/h (62 mph) in 5.9sec while achieving a top speed of 265 km/h (165 mph), 15km/h (9 mph) faster than the standard car.

As with all A5 variations, MTM offers what they call, “a perfectly tuned” coilover suspension which, through altered axle geometry, has a higher camber value. The German tuner also upgrades the A5’s braking system with 8-piston fixed calipers and 380x34mm semi-perforated brake discs. According to MTM, with these brakes, the Audi A5 can stop from 100km/h (62 mph) in 35 meters (115 ft.).

In terms of looks, MTM optimizes the A5 by adding the S5’s radiator grille as well as a rear lower bumper portion combined with 4-pipe rear muffler. In regards to wheels, MTM equips the A5 with a set of 21-inch “bimoto” alloy rims covered 295/25 ZR21 rubber.