Official BMW M3 M4 Specs

[ΔημήτρηςΜ3]

ENGINE

• Inline 6 cylinder engine with two mono-scroll turbochargers
  
  • Direct Injection
  • VALVETRONIC
  • Double-VANOS
  • closed-decked crankcase
  • twin-wire arc-spray coating (instead of liners) in cylinder bores reduce engine weight
  
  
• 430 HP (approximately)
• "far beyond" 369+ LB-FT (500 Nm)
• See Dyno Chart
• Higher than 7500 RPM redline

TURBOS

• Two mono-scroll turbochargers
• Impulse charging for optimized responsiveness
• Flow-enhanced manifolds
• Electric wastegate actuator

COOLING

• Double-flow oil recirculation pumps
• Turbocharger suction system
• Main radiator plus additional radiators for the high- and low-temperature circuits, turbocharger and transmission,
• Large indirect intercooler
• Low-weight magnesium oil sump
• Temperature-stabilizing electric water pump

WEIGHT

• Under 3,306 lb (1500kg) weight
  
  • this figure is without driver and with 90% fuel
  • for more clarification, it's mentioned that "the new model is now around 80 kilograms lighter than a comparably equipped predecessor model" [80kg = 176 lbs]
  
  
  
  • compare to E46 M3 at ~3,400 lb curb weight
  • compare to E92 M3 at ~3,600 lb curb weight
  • compare to C63 AMG at ~3,900 lb curb weight
  • compare to RS5 at ~4,000 lb curb weight
  
  
• ~ 7.68 lb/hp power to weight
  
  • compare to E92 M3 at 8.7
  • compare to C63 AMG at 8.7
  • compare to RS5 at 9.0
  • compare to E46 M3 at 10.25
  
  
• Fuel consumption and emissions reduction of 25%

CARBON FIBER CONSTRUCTION

• CFRP drive shaft
  
  • 40% weight savings over previous M3
  • increased stiffness
  • reduced rotating mass for better acceleration and throttle response
  
  
• CFRP roof for both M3 and M4
  
  • saves 11 pounds (5kg) on M3
  • saves more than 13.2 pounds (6kg) on M4
  
  
• CFRP roof bow
• Carbon fiber trunk for M4 (11 pounds (5kg) weight savings)
• CFRP front strut brace standard (weighs just 3.3 pounds (1.5 kg))

TRANSMISSION

• Standard 6 speed manual transmission
  
  • automatic throttle blips on downshift
  • more compact and quieter than predecessor E90/E92 M3 6 speed
  • 26.4 pounds (12kg) lighter
  • carbon fiber friction linings in synchroniser rings
  • dry sump lubrication
  
  
• Optional 7 speed M DCT (double clutch transmission) with launch control
• Active M Differential (with constantly variable locking a la M5/M6)
• Forged crankshaft

STEERING

• Electric power steering specially tuned for M3/M4
• Servotronic function electronically adjusts the level of steering assistance
• Three modes: Comfort, Sport, Sport+

SUSPENSION / CHASSIS

• Optional Adaptive M suspension (with Comfort, Sport, Sport+ modes)
• CFRP front strut brace
• Double-joint spring strut front axle (saves 11 pounds)
• New five-link rear axle made from forged aluminum (saves 6.6 pounds)
• Aluminum suspension
• Aluminium stiffening plate
• Rear axle subframe fixed directly to body (bolted joints between the axle subframe and the body sills, without use of elastic rubber elements).

WHEELS / BRAKES

• Lightweight forged wheels standard
• Staggered tire sizes
• M compound brakes standard (in blue)
• M carbon ceramic brakes optional (in gold)

EXHAUST

• Exhaust features electrically controlled flaps just before rear silencer to minimize exhaust back-pressure as well as giving precise feedback on engine load.

AERO

• 50:50 weight distribution
• Air Curtain
• M gills with integrated Air Breather behind front wheels

MISC

• M3 and M4 to be introduced together (at Detroit NAIAS 2014 in January).
• M3 and M4 developed with help of BMW race car drivers Bruno Spengler and Timo Glock's participation in extensive testing and set- up runs on the Nürburgring-Nordschleife circuit, focusing on assessment of the carsΆ suspension, tyres and all elements of the powertrain.

yno / Technical Slides