A rear-wheel drive vehicle, the Porsche Cayman S is powered by a naturally aspirated 3.4 liter six-cylinder engine outputting 320 horsepower and 370 Nm of torque. While the Cayman is not always thrown in the same category as the M4 or RS5, on paper it can be described as a competitor.
Now when it comes to the M4 and RS5, at a first glance, there are a number of commonalities and similarities between the two cars, such as the dimensions: just over two centimeters separate the two also a small difference in engine performance – only 19 hp between the counterparties.
But there are a series of major differences, starting with the all-wheel drive on the Audi RS5 while the M4 stays true to BMW’s rear-wheel drive architecture. The Audi RS5 also comes with a 4.2 liter V8 engine. The RS5’s engine makes 450 horsepower and 317 lb-ft.
Manual transmission or 7-speed DCT for the M4, only a 7-speed S tronic DCT for the RS5.
So which one takes the win?
1st: BMW M4
Fans of fast BMWs should rejoice, because the new M4 is one of the best M cars yet. It wraps up supercar-rivalling performance in a practical four-seater body. It’s not cheap, but few cars provide as much performance per pound.
|BMW M4||Porsche Cayman S PDK||Audi RS5|
|On-the-road price/total as tested||£59,145/£67,515||£51,245/£64,751||£59,870/£62,640|
|Residual value (after 3yrs/30,000)||£29,573/50.0%||£23,316/45.5%||£24,906/41.6%|
|Annual tax liability std/higher rate||£3,634/£7,267||£3,042/£6,085||£4,129/£8,259|
|Annual fuel cost (12k/20k miles)||£3,594/£5,990||£2,916/£4,861||£3,511/£5,851|
|Ins. group/quote/road tax band/cost||42/£529/J/£265||41/£466/J/£265||45/£574/L/£485|
|Cost of 1st/2nd/3rd service||£1,000 (5yrs/50k)||£480/£610/£480||£44pcm (3yrs)|
|Engine||6cyl in-line/2,979cc||Flat 6cyl/3,436cc||V8/4,163cc|
|Peak power||425/5,500 bhp/rpm||321/7,400 bhp/rpm||438/8,000 bhp/rpm|
|Peak torque||550/1,850 Nm/rpm||370/4,500 Nm/rpm||430/4,000 Nm/rpm|
|Transmission||7-spd auto/rwd||7-spd auto/rwd||7-spd auto/Awd|
|Fuel tank capacity/spare wheel||60 litres/sealant||64 litres/sealant||61 litres/sealant|
|Boot capacity (seats up/down)||445 litres/N/A||150 l front/275 l rear||455/829 litres|
|Turning circle/drag coefficient||12.2 metres/0.34Cd||11.0 metres/0.30Cd||11.6 metres/0.32Cd|
|Basic warranty (miles)/recovery||3yrs (unltd)/3yrs||3yrs (unltd)/3yrs||3yrs (60,000)/3yrs|
|Service intervals/UK dealers||Variable/153||20,000 (2yrs)/36||Variable/121|
|Driver Power manufacturer/dealer pos.||10th/24th||6th/6th||12th/23rd|
|Euro NCAP: Adult/child/ped./stars||N/A||N/A||N/A|
|0-60/30-70mph||4.5/3.5 secs||4.0/3.5 secs||4.4/3.6 secs|
|30-50mph in 3rd/4th||1.9/2.7 secs||2.8/3.7 secs||2.5/3.3 secs|
|50-70mph in 5th/6th/7th||3.2/4.0/6.0 secs||4.3/5.2 secs/N/A||4.6/5.7/7.7 secs|
|Top speed/rpm at 70mph||155mph/2,000rpm||174mph/2,000rpm||155mph/2,400rpm|
|Noise levels outside/idle/30/70mph||65/49/61/68dB||65/56/68/77dB||68/45/55/68dB|
|Auto Express econ (mpg/mpl)/range||21.1/4.7/278 miles||26.0/5.8/366 miles||21.6/4.8/290 miles|
|Actual/claimed CO2/tax bracket||309/194g/km/31%||251/190g/km/30%||302/246g/km/35%|
|Adapt. dampers/cruise/active control||Yes/yes/yes||£971/£267/£1,368||£1,710/yes/£900|
|Ceramic brakes/leather/heated seats||£6,250/yes/yes||£4,977/£1,428/£284||£5,250/yes/yes|
|Metallic paint/xenons/sports exhaust||Yes/yes/no||£588/yes/£1,530||£614/yes/£890|