German tuning house Motoren Technik Mayer (or MTM) have turned up the wick on Audi's S5 Coupe by adding a supercharger to the standard car's 4.2-litre V8. The end result? Think 42% more power and a 24% increase in torque. That's right, this baby's got over 500 tyre-smokin' horses under that bonnet.
The supercharger works its magic by forcing air through an integrated liquid-to-air intercooler, which improves compressor efficiency and protects the engine from damage from detonation. A full stainless-steel exhaust speeds up gas flow and, according to MTM, emits "The goose pimple-raising sound". Total output from the MTM-fettled engine is a very respectable 505hp - 120hp per litre - while there's a stump-pulling 546Nm of torque.
A coilover suspension upgrade stiffens and lowers the ride, while camber is increased to enhance cornering response and lateral grip. Brakes haven't been neglected either, with MTM installing 8-piston calipers and huge 380mm rotors behind those 21-inch rims. The rear brakes have been left stock.
All up, the modifications are enough to propel the S5 to 100kph in 4.3 seconds, while top speed is now a nice and even 300kph. How much does it all cost? MTM don't say, but we're sure they'll have pricing info for each of the mods up on their site soon.
Motoren Technik Mayer from Wettstetten, Germany, puts the Audi S5 under pressure. As "MTM GT Supercharged" the sporty coupe's supercharged engine demonstrates impressive performance data. Together with bigger brakes, a coilover suspension and other minor changes, the result is an overall package which can take on the race track.
Watch out, when it gets loose! At the slightest pressure on the accelerator the MTM S5 GT Supercharged rockets forward with brute force. The compressor added to the Audi 4.2 liter V8 by MTM is what makes this possible. An MTM intercooler housing with integrated water cooling ensures that the engine can always generate maximum performance. Overall, instead of the stock 354 hp, there is now all of 505 horsepower at 7190 rpm available. This makes an engine output of 120 hp per liter! The torque boost by 106 to 546 Nm emerges in vehement intermediate bursts, to which the driver can get addicted. The sprint from 0-100 km/h takes 4.3 seconds, turning many super sports cars green with envy. And up to its top speed of 300 km/h it can hold its own with any of them.
The evenly powerful, dynamic power display is underscored by a flow-optimized stainless steel sports exhaust system. The goose pimple-raising sound is released by four tailpipes, each 90 mm in diameter.
Curve-hugging and agile
MTM equipped its GT Supercharged with a perfectly tuned coilover suspension and in addition amended the axle geometry with higher camber angles. After the change, its driving dynamism and curve-hugging characteristics are so pronounced you never want to drive straight-ahead again. The steering characteristics are more precise and the agility enhanced, while road handling remains quite neutral.
Since a performance-enhanced vehicle also has to be reined in quickly, MTM improved the brake performance, too. Consequently MTM always provides the appropriate brake system for cars of all performance classes. In the case of MTM GT Supercharged, the Bavarian specialists upgraded the deceleration with a new brake system on the front axle. This is a brake system with 8-piston fixed calipers and 380x34 mm pitted brake discs. The package includes the flexible steel lines and attachments. With the system the driver can decelerate the MTM GT Supercharged from 100-0 km/h within about 35 m. The "pitted" brake discs incidentally represent a special design, manufactured especially for MTM. Typical of "pitted" brake discs are the holes which do not completely penetrate the disc. They look like and share the characteristics of a perforated disc, but hinder the crack formation which normally occurs after lengthy use.
The small difference
Optically the GT Supercharged does not look very different from the series model. Here MTM has gone in for understatement. Nevertheless ? apart from the MTM exhaust system's pipes ? the "bimoto" MTM rims take care of a look clearly distinguished from the series. The eye-catching wheels are available in "shiny silver", "titanium" and "diamond cut" finishes. MTM provides the "bimoto" rim for the S5 ? as for other A5 models too ? in 10.5x21" as a complete rim set together with 295/25/ZR21 tires.
At MTM the general rule is: special wishes are met. Customization is also carried out on an individual basis!