出ましたね♪
どなたか、買いませんか？！♪
Debut / Pricing:
•Debuts at 2014 NY International Auto Show
•Arrives in US showrooms in Summer 2014
•2015 model pricing to be announced at NYIAS
Engine / Exhaust
•3.0L inline 6 cylinder Twin Turbo engine (S55)
•2,979 cc
•Stroke/Bore: 89.6mm / 84.0mm
•425 HP from 5500-7300 RPM
•406 LB-FT torque from 1850-5500 RPM
•0-60 MPH: 4.2 seconds (DCT) / 4.4 seconds (manual)
•7600 RPM rev limiter
•10.2:1 compression ratio
•Top Speed: 155 MPH / 250 KMH
•Nearly 25% fuel consumption and emissions reduction over E90/E92 M3
•22 pounds / 10 kilograms lighter than S65 V8 predecessor engine
•Two mono-scroll turbochargers
◦Mitsubishi mono-scroll turbochargers
◦18.1 PSI / 1.25 BAR max peak
◦Pre-tensioned in Sport and Sport+ modes (keep spinning at a high rate of speed even after throttle lift-off, for ultra quick response - more details)
◦Impulse charging for optimized responsiveness
◦Flow-enhanced manifolds
◦Electric wastegate actuator
•Direct Injection, Valvetronic variable valve timing and Double-VANOS continuously variable camshaft timing
•Closed-deck crankcase design (4.4 lbs / 2kg lighter)
•Twin-wire arc-sprayed coating used instead of liners (saves weight)
•Forged, torsionally rigid crankshaft (3kg / 6.6 lbs) lighter than typical BMW inline 6 engine)
•Track-specification cooling system
◦Air intake system features an indirect intercooler
◦Water cooler repositioned to the side for the high- and low-temperature water circuits, and the engine and transmission oil (if the M Double Clutch Transmission is specified)
◦Additional electric coolant pump cools the turbocharger bearing mounts when the car is stationary
◦Low-weight magnesium oil sump features special cover to limit movement of the oil under the effects of strong dynamic lateral acceleration
◦Under extreme longitudinal acceleration and deceleration, an oil extraction pump and a sophisticated oil return system situated close to the turbocharger help to maintain stable oil circulation
◦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 (sits atop engine, necessitating hood bulge)
◦Low-weight magnesium oil sump (2.2 lbs / 1kg lighter)
◦Temperature-stabilizing electric water pump
•Electronically control Exhaust
◦Electrically controlled flaps just before the rear silencer minimize exhaust back-pressure and produce a BMW M sound, as well as giving precise feedback on engine load
◦When closed, flow is forced into and laterally across the silencer; when open, flow is more directly through the narrow part of the silencer
◦Different selectable drive modes feature different engine sound profiles
◦Catalysts with metal substrate (less restrictive than ceramic)
◦Exhaust always exits all four tail pipes
Transmission
•7 Speed M Double Clutch Transmission (M-DCT) with Drivelogic
◦Third generation M-DCT
◦Integrated Launch Control function
◦Stability Clutch Control opens clutch when car is understeering to bring it back into line
◦Drivelogic modes can be selected for more comfortable, economy focused or sportier characteristics
•6 Speed Manual Transmission
◦Robust double-plate clutch
◦More compact and quieter than predecessor
◦26.4 pounds (12kg) lighter than predecessor
◦New carbon friction linings in synchronizer rings increases shift comfort
◦Dry sump lubrication
◦Automatic throttle blip downshifts (rev matching is disabled in Sport+ mode; active in Sport and Comfort modes)
Active M Differential
•Hollow lightweight output shafts
•Electronically controlled multi-plate limited slip differential (LSD)
•Control unit links up with the DSC (Dynamic Stability Control) system and also takes into account the position of the accelerator pedal, the rotational speed of the wheels and the car’s yaw rate
•0% - 100% degree of lock
•M Dynamic Mode allows greater wheel slip, but with the safety net of DSC
CFRP drive shaft
•feeds engine's torque from gearbox to rear differential
•increased stiffness
•reduced rotating mass for better acceleration and throttle response
•single-piece unit with no center bearing
•40% weight saving over predecessor
•tested for speeds up to 205 MPH
Electric Power Steering
•Entirely new electric power steering (EPS) unit, built by ZF
•Servotronic function electronically adjusts the level of steering assistance according to the car's speed
•3 modes: Comfort, Sport, Sport+ (standard option)
•Specially tuned for M3/M4
•Will not compensate for understeer, oversteer, coarse road surface. Motor will not help unwind the steering wheel and it will self-center by by natural forces
Suspension / Tires / Brakes
•Optional EDC Adaptive M Suspension features 3 modes: Comfort, Sport, Sport+
•Double-joint spring strut front axle
◦Lightweight aluminum construction for components such as control arms, wheel carriers and axle subframes saves 11 pounds (5kg) over a conventional steel design
◦Play-free ball joints and elastomeric bearings developed specially for the M3/M4 ensure an optimum and direct transfer of forces both laterally and longitudinally
◦Aluminum stiffening plate
◦CFRP front strut brace
•Five-link rear axle
◦Forged aluminum construction for control arms and wheel carriers - reducing unspring mass of wheel-locating components by around 6.6 pounds (3 kg)
◦Rear axle subframe bolted directly to body structure (bolted joints between the axle subframe and the body sills, without use of elastic rubber elements)
•Tires incorporated into construction process for the axles
◦low-weight 18-inch forged wheels (front axle: 9 J x 18, rear axle: 10 J x 18) with mixed-size tires (front axle: 255 mm, rear axle: 275 mm).
◦19-inch wheels and tires are available as an option (in Ferric Grey or Black)
•BMW M compound brakes standard (in blue)
◦four piston front / two piston rear
•BMW M carbon ceramic brakes optional (in gold)
◦six piston front / four piston rear
◦6-7kg (13.2lbs - 15.4lbs) lighter overall than standard brakes
BMW M4 カブリオレ 発表！ 
出ましたね♪
私も過去3回参加していますが、お勧めです。
出力は２５％アップの予定、、、なそうです。
