BMW has confirmed 300 units of the 2016 BMW M4 GTS for the U.S. market. Built by BMW M GmbH, the high-performance coupe brings enhanced track capability and technology firsts to a street car, according to the automaker.
While a water injection kit is a popular aftermarket feature for fully-built high-performance street and race cars, the new 2016 BMW M4 GTS Coupe is the first production road car to come equipped with the system. When injected into the intake tract as a fine mist spray, water absorbs heat as it evaporates, significantly lowering the intake temperature to safely run increased boost pressure and advanced ignition timing. The system also helps reduce knock and heat related stresses on engine components. Water injection can reduce intake air temperatures more than intercooling alone.
As with the standard BMW M4, the new GTS model is powered by the automaker's twin-turbocharged 3.0-liter M TwinPower inline-six engine. With the water injection kit, the M4 GTS makes 493 hp at 6,250 rpm and 442 lb-ft of torque from 4,000 to 5,500 rpm. The model sees increases of 16 percent horsepower and 10 percent torque over the standard M4 Coupe's 425 hp and 406 lb-ft rating. A seven-speed dual-clutch transmission sends power to the rear multi-plate limited-slip Active M Differential. BMW claims the M4 GTS can reach 60 mph in 3.7 seconds and is governed at 189.5 mph. In our testing, a standard 2015 BMW M4 reached 60 mph in 4.0 seconds. Fuel economy is said to be similar to the standard car.
The suspension features a three-way adjustable coilover suspension with mechanically adjustable compression and rebound settings as well as independent adjustment of low-speed and high-speed compression. Anti-roll bars have been adapted to the more powerful engine load. The electric power steering system has also been retuned for track use with computer and mechanical upgrades.
Although optional on the standard BMW M4, the M4 GTS comes with a set of carbon ceramic brake rotors with six-piston front and four-piston rear calipers. The BMW M4 GTS rides on a set of 19x9.5-inch wheels up front and 20x10.5-inch wheels out back. The lightweight forged alloy wheels are wrapped by a set of Michelin Pilot Sport Cup 2 tires (front: 265/35 R19; rear: 285/30 R20).
Overall vehicle weight has been reduced through lightweight materials including a carbon-fiber-reinforced plastic (CFRP) roof (saving 13 pounds) and CFRP hood (25 percent lighter than aluminum), CFRP and plastic trunk lid, and CFRP spoiler with CNC-milled aluminum supports. Other carbon fiber bits include an adjustable front splitter, rear apron spoiler, and CFRP driveshaft. There is also a carbon fiber instrument panel support and CFRP driveshaft. The sports exhaust system features a lightweight titanium silencer (20 percent lighter).
Inside, there are new sportier seats finished in Alcantara and a redesigned center console that is 30 percent lighter than that in the standard BMW M4. Additionally, the rear seats have been tossed in favor of a new glass-fiber-reinforced plastic (GFRP) trim and carbon sandwich bulkhead. The door panels are also 50 percent lighter, while the door handles have been replaced with door release pull loops. Alcantara is also used on the armrest, shifter boot, and sport steering wheel. Track safety bits include a high-strength steel roll bar and a fire extinguisher both mounted behind the front seats.
In addition to their lightweight construction, the front fascia and splitter, vented hood, rear diffuser, deck lid and rear wing, and more have been aerodynamically optimized. Another street car first is the new BMW Organic Light with OLED (organic light-emitting diodes) technology headlights for improved lighting.
Exterior colors include Sapphire Black metallic, Mineral Grey metallic, Alpine White, and Frozen Dark Grey Metallic paint finish. Acid Orange is used for interior and exterior contrast and accenting.