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BMW Z4 M v Boxster S v TVR Tuscan v Alpina: M Power Strikes Back

BMW's new Z4 M Roadster takes on the Porsche Boxster S, TVR Tuscan and Alpina Roadster S


 BMW Z4 MPorsche Boxster STVR TuscanBMW Aplina
EngineIn-line 6-cylHorizontally opposed 6-cylIn-line 6-cylIn-line 6-cyl
LocationFront, longitudinalMid, longitudinalFront, longitudinalFront, longitudinal
Cylinder BlockCast ironAluminium alloyAluminium alloyCast iron
Cylinder HeadAluminium alloy, dohc, 4v per cylinder, variable cam timingAluminium alloy, dohc per bank, 4v per cyl, VarioCamAluminium alloy, dohc, 4v per cylinderAluminium alloy, dohc, 4v per cylinder, variable cam timing
Fuel and IgnitionBosch engine management, multi-point fuel injectionDME engine management, multi-point fuel injectionElectronic engine management, multi-point fuel injectionSiemens engine management, multi-point fuel injection
Max Power338bhp @ 7900rpm276bhp @ 6200rpm380bhp @ 7000rpm295bhp @ 6300rpm
Max Torque269lb ft @ 4900rpm236lb ft @ 4700rpm310lb ft @ 5250rpm267lb ft @ 4800rpm
TransmissionSix-speed manual, rear-wheel-drive, M differential, DSC+ stability controlSix-speed manual, rear-wheel drive, limited-slip differentialFive-speed manual, rear- wheel drive, limited-slip differentialSix-speed manual, rear- wheel drive, traction and stability control
Front SuspensionMacPherson struts, coil springs, gas dampers, anti-roll barMacPherson struts, coil springs, PASM damping, anti-roll barDouble wishbones, coil-over gas dampers, anti-roll barMacPherson struts, coil springs, gas dampers, anti-roll bar
Rear SuspensionMulti-link, coil springs, gas dampers, anti-roll barMacPherson struts, coil springs, PASM damping, anti-roll barDouble wishbones, coil-over gas dampers, anti-roll barMulti-link, coil springs, gas dampers, anti-roll bar
BrakesVented discs, 345mm front, 328mm rear, ABS, EBDCross-drilled and vented discs, 318mm fr, 299mm rr, ABS, PSMVented discs, 322mm front, 298mm rearVented discs, 300mm front, 294mm rear, ABS, EBD
Weight Kerb1485kg1345kg1100kg1320kg
Power to Weight231bhp/ton208bhp/ton350bhp/ton227bhp/ton
Max Speed155mph (limited)166mph (claimed)160mph+ (claimed)165mph (claimed)
Basic Price£42,750£39,160£39,950£37,850
Price as tested£46,925£46,259£55,388£40,450
0 to 60 MPH5.0sec (claimed)5.5sec (claimed)3.9sec (claimed)5.3sec (claimed)

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