The BMW M4 is a high-performance version of the BMW 4 Series automobile developed by BMW's motorsport division, BMW M GmbH. Part of the renumbering that splits the 3 Series coupé and convertible models from the 4 Series (to further differentiate it from the 3 Series), the M4 replaced the M3 coupé and convertible models. Upgrades over the standard BMW 4-Series include: a powerful and responsive, twin turbocharged engine; improved handling, suspension, and braking systems; aerodynamic body enhancements; interior/exterior accents with the tri-colour "M" (Motorsport) badging; reduced weight compared to the standard 4 Series and its predecessor with an all-new stiffer chassis and extensive use of carbon fibre, especially on the roof of the car.
On September 25, 2013, BMW released the technical specifications of the M4. It is powered by the S55B30 engine, which is developed and engineered by BMW M GmbH. This 3.0-litre inline-6 engine has been built specifically for the new M4/M3, having a redline of 7,600 RPM with the rev limiter coming in at 7,300 rpm. The engine uses two mono-scroll turbochargers with a peak boost pressure of 18.1 psi (1.25 bar). The power is rated at 317 kW (431 PS; 425 hp), however this is achieved not at a specific engine speed, but is instead rated throughout the range of 5,500 - 7,300 RPM. The engine's torque is rated at 550 N⋅m (406 lbf⋅ft) throughout the RPM range of 1,850 - 5,500. The weight of the M4 equipped with a manual transmission is 1,572 kg (3,466 lb) and with the M-DCT, the car is some 40 kg (88 lb) heavier, losing some 80 kg (176 lb) from the E92 M3. Two transmission choices are available, those being the 6-speed manual and 7-speed M-DCT transmissions. The 7-speed M-DCT transmission accelerates the car from 0 to 100 km/h (62 mph) in 4.1 seconds). With the 6-speed manual transmission, the car accelerates from 0 to 100 km/h (62 mph) in 4.3 seconds.
Carbon fibre reinforced plastic is used extensively throughout the car, including drive shaft, roof, roof bow, trunk, and front strut brace. For the first time in a M vehicle, an electric power steering unit is being used. The steering system is specifically tuned for both the M3 and M4. The 18 inches (460 mm) and 19 inches (480 mm) wheel options are available with lightweight forged alloys being standard. The M compound brakes come standard (in blue), while carbon ceramic brakes (in gold) are available as an option.
The M4 features Active Sound. A live amplification of the engine's natural sound inducted into the passenger cabin via speakers in the car. BMW says this technology has been used so that the well insulated cabin can reduce road/wind noise but still provide the driver with the sporty sound of the M powered engine. There are no artificial sound or any pre-recorded track in the system. This system was first implemented in the M5 (F10).
The M4 is based on the F32 4 Series however 50 percent of its components are unique as compared to the 4 Series.
The convertible variant of the M4 was announced along with its coupe sibling, also internally known as F82 or F83 M4. It shares almost everything with the coupé version, but weighs more due to its retractable hardtop. The convertible weighs 1,750 kg (3,858 lb) (manual), 1,691 kg (3,728 lb) (M-DCT). The three-piece retractable hardtop folds in 20 seconds. The only significant difference between the two is the weight due to its retractable hardtop. As with any convertible car, the driver will experience its stiff ride due to added rigidity. Like its hardtop counterpart, the F83 M4 uses carbon fibre reinforced plastic and carbon fibre to lighten and stiffen the car.
Because of its extra weight it accelerates slower, taking it 0.3s longer to 100 km/h (62 mph), 4.6s with the manual and 4.3s with the M-DCT transmission. The dynamic differences between the two variants are marginally small. The F83 M4 is significantly more expensive than the hardtop variant, at $8,300 more than the coupe.
During February 2016, BMW announced the M3/M4 Competition Package. With this package, the M4 boasts 331 kW (450 PS; 444 hp) and a revised suspension for better handling. New springs, dampers and anti-roll bars complement the included Adaptive M Suspension. BMW also re-tuned the electronic differential and the Dynamic Stability Control to match the upgraded hardware. The interior remains largely unchanged, but Competition Package cars get new lightweight sport seats along with the M-striped woven seat belts. The exterior include the M Sport exhaust with black chrome tailpipes and high gloss Shadow Line exterior trim. Gloss black trim are added to the kidney grille, side gills, and model badge on the trunk.
With the competition package the Coupe version goes from standstill to 100 km/h (62 mph) in 4.0s, while the convertible version does the run in 4.2s, both using the dual clutch transmission.
The Competition package costs $4,750 for the M3/M4 and $4,250 for the M4 convertible on top of its base price.
BMW introduced the M4 GTS concept in August 2015 at the Pebble Beach Concours d'Elegance. In 2016, BMW released the production version of the car which was a track-focused version of the standard M4 coupé itself with a limited production run of 700 units. It is powered by the same 2,979 cc (3.0 L; 181.8 cu in) twin-turbocharged straight-six engine as in the normal M4, but the power has been raised to 500 PS (368 kW; 493 hp) at 6,250 rpm and 600 N⋅m (443 lb⋅ft) of torque at 5,500 rpm largely due to a nozzle water injection system that is the first to be used on a production automobile in almost twenty years. In addition to the increased engine power, the M4 GTS is 27 kg (60 lb) lighter than the standard M4 Coupé with the DCT transmission, so the weight now stands at 1,585 kg (3,494 lb). The 0 to 100 km/h (62 mph) acceleration time is reduced to 3.8 seconds, while the top speed stands at 305 km/h (190 mph). The M4 GTS has, according to BMW, lapped the infamous Nürburgring Nordschleife track in 7 minutes and 28 seconds, 24 seconds faster than the base M4 and 20 seconds faster than the M3 GTS. This equates to the same time as a Porsche Carrera GT.
The BMW M4 was first launched in 2014 as the DTM Champion Edition, following the victory of Marco Wittmann in the 2014 DTM season. The model is based on Wittmann's 2014 M4 DTM in color. The 2014 Champion Edition is limited to 23 pieces, Wittmann's race number.
After winning the 2016 season, BMW once again released a DTM Champion Edition of the M4. The M4 DTM Champion Edition uses the engine from the M4 GTS with 500 PS (368 kW; 493 hp) 600 N⋅m (443 lb⋅ft) and water injection. All performance data are identical to those of the GTS. It is limited to 200 pieces and is only available in white in keeping with DTM car. The biggest visual difference to the GTS lies in the smaller spoiler, as well as the omission of the orange design elements.
In early 2017, BMW announced M4 CS in limited run of 3,000 units globally. The M4 CS sits between the M4 Competition Package and the M4 GTS. The M4 CS utilises the same engine as the standard M4 which generates 338 kW (460 PS; 453 hp) and 600 N⋅m (443 lb⋅ft) of torque.
The BMW M4 DTM competes in the Deutsche Tourenwagen Masters since 2014. Marco Wittmann won the 2014 and 2016 championships.
The M4 GT4, aimed at amateur drivers, debuted at the 2017 24 Hours of Nürburgring. It features a 3.0L turbocharged straight-six engine producing 431 PS (425 hp; 317 kW), and a 7-speed dual clutch transmission.
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