Next year, BMW Canada says it will import 50 examples of the M4 GTS, a higher-performance variant of the M4 coupe we told you about earlier this year. it will be limited to 700 units worldwide, and the first road car to use water injection to enhance power output.
Adding that technology to the car’s twin-turbo inline six-cylinder engine allowed engineers to coax an extra 68 hp and 36 lb-ft of torque, for totals of 493 hp and 442 lb-ft, according to BMW. Water injection has its roots in boosting performance in military aviation engines, but was later adopted for use in racing engines. Injecting water into the combustion chamber causes the water to absorb excess heat, cooling the fuel/air mixture and helping to prevent pre-ignition (otherwise known as detonation, or knocking/pinging).
Peak horsepower happens at 6,250 rpm, while the high-revving motor makes max torque between 4,000 and 5,500 rpm, and can rev to 6,800 rpm. With the help of BMW’s seven-speed dual-clutch transmission, the M4 GTS will sprint from zero to 100 km/h in 3.7 seconds (a notably 0.6 seconds quicker than the standard M4), and run to a top speed of 189.5 mph (just shy of 305 km/h).
Those are the only technical details the automaker has released so far; all BMW till tell us otherwise is that it has created a sports car designed to set record lap times (the company says the M4 GTS circled the Nurburgring Nordschleife in 7:28) and then be comfortable enough to drive home from the track. Watch for more technical details (some of which you can glean from the photo slideshow) and pricing closer to the car’s launch, set for Spring of 2016.