Power struggle - specifications

 BMW M3Audi RS4
On the road price/total as tested"£50,625/£50,625""£51,105/£52,375"
"Residual value (after 3yrs/36,000)"N/a"£29,642/58.1 per cent"
Running costs/contract hireN/a118ppm/£907
Annual tax liability std/higher rate"£3,898/£7,087""£3,928/£7,143"
"Annual fuel cost (12,000 miles)"N/A"£3,034"
Insurance group/quote 20/£TBC20/£TBC
Cost of 1st/2nd/3rd service£TBC£380/£480/£380
Length/wheelbase "4,615/2,761mm""4,589/2,648mm"
Height/width"1,418/1,804mm""1,415/1,816mm"
Engine"V8/3,999cc""V8/4,163cc"
Peak power"414/8,300 bhp/rpm""414/7,800 bhp/rpm"
Peak torque"400/3,900 Nm/rpm""430/5,500 Nm/rpm"
Transmission6-spd man/rwd6-spd man/4wd
Fuel tank capacity/spare wheel 63 litres/foam sealant63 litres/foam sealant
Boot capacity430 litres460 litres
Kerbweight/payload/towing weight"1,655/500kg""1,650/600kg"
Turning circle/drag coefficient11.7 metres/N/A11.1 metres/0.31Cd
Basic warranty (miles)/recovery"3yrs (60,000)/3yrs BMW""3yrs (60,000)/3yrs RAC"
Service intervals/UK dealers Variable/155Variable/133
0-60/30-70mph4.9/4.1 secs4.7/3.9 secs
30-50mph in 3rd/4th 2.9/4.1 secs2.8/4.1 secs
50-70mph in 5th/6th 5.1/6.6 secs5.1/6.8 secs
Top speed 155mph155mph
Braking 70-0/60-0/30-0mph 43.3/31.4/8.2 metres46.2/34.1/8.5 metres
Noise levels outside/idle/30/70mph64/50/60/68dB68/48/64/73dB
Auto Express economy/rangeN/A17.4mpg/241 miles
Govt urban/extra-urban/combined 15.8/30.7/22.8mpg13.7/30.1/20.9mpg
CO2 emissions/tax bracket295g/km/35 per cent324g/km/35 per cent
Airbags/parking sensors front/rearSix/£285/£285Six/yes/yes
Air-conditioning/leather/metallic paintYes/yes/yesYes/yes/yes
Automated gearbox/active suspension"No/£1,300"No/yes
Ceramic brakes/stability/cruise controlNo/yes/yes"£4,325/yes/yes"
Power fold mirrors/multifunc steering£255/yes£120/yes
Satellite navigation/CD changer/MP3Yes/£295/yes"£1,975/£320/£175"
TV/Bluetooth/tracker/xenon headlights£710/£535/DFO/yes£705/£400/DFO/yes

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