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Super-saloon megatest - specifications

 Mercedes C63 AMGLexus IS FBMW M3 saloonAudi RS4
On the road price/total as tested"£51,317/£52,447""£51,105 /£51,105""£49,415/£54,245""£50,105/£52,730"
"Residual value (after 3yrs/36,000)""£27,403/53.4%"N/A/N/A"£26,486/53.6%""£27,658/55.2%"
Running costs/contract hire"149.2ppm*/£1,051* "N/A/N/A139.6ppm/£957145ppm/£992***
Annual tax liability std/higher rate"£3,951/£7,184""£3,927/£7,140""£3,805/£6,918""£3,858/£7,015/"
"Annual fuel cost (12/20,000 miles)""£3,762/£6,271""£3,888/£6,480""£3,513/£5,855""£3,295/£5,491"
Ins grp/quote/road tax band/cost 20/N/A/G/£300TBC/N/A/G/£30020/£973/G/£30020/£947/G/£300
Cost of 1st/2nd/3rd service£188/£437/£450TBC"£1,700 over 3yrs"£380/£480/£380
Length/wheelbase "4,725/2,765mm""4,660/2,730mm""4,580/2,761mm""4,589/2,648mm"
Height/width"1,438/1,795mm""1,405/1,815mm""1,447/1,817mm""1,415/1,816mm"
Engine"V8/6,208cc""V8/4,969cc""V8/3,999cc""V8/4,163cc"
Peak power"451/6,800 bhp/rpm""417/6,600 bhp/rpm""414/8,300 bhp/rpm""414/8,300 bhp/rpm"
Peak torque"600/5,000 Nm/rpm""505/5,200 Nm/rpm""400/3,900 Nm/rpm""430/5,500 Nm/rpm"
Transmission"7-spd, auto/rwd""8-spd, auto/rwd""6-spd, man/rwd""6-spd, man/rwd"
Fuel tank capacity/spare wheel 66 litres/space-saver64 litres/space-saver63 litres/foam sealant63 litres/foam sealant
Kerbweight/payload/towing weight"1,730/505kg""1,700/410kg""1,680/545kg""1,650/600kg"
Turning circle/drag coefficient10.8 metres/0.31CdN/A/0.27Cd11.7 metres/0.31Cd11.1 metres/0.31Cd
Basic warranty (miles)/recovery3y (unltd)/30y Mobilo3y (60k)/3y Toyota3y (60k)/3yRAC3y (60k)/3y RAC
Service intervals/UK dealers Variable miles/136"10,000 miles/51"Variable miles/155Variable miles/135
Driver Power position (car/dealers)N/A/18*5/1N/A/11N/A/16
Euro NCAP adult/child/pedest/total5/3/2/795/4/2/875/4/3/784/NA/1/37+
0-60/30-70mph4.3/3.5/9.5 secs 4.7/3.9/10.8 secs 4.6/3.9/10.0 secs 4.7/3.9/11.1 secs
Standing quarter mile/speed12.5 secs/117mph13.4 secs/110mph12.8 secs/114mph13.2 secs/109mph
30-50mph in 3rd/4th 2.3/3.5 secs2.8/3.8 secs2.7/4.0 secs2.8/4.1 secs
50-70mph in 5th/6th/7th/8th 5.0/7.0 secs/N/A/N/A4.4/5.9/7.9/11.3 secs4.4/5.8 secs/N/A/N/A5.1/6.8 secs/N/A/N/A
Top speed/rpm at 70mph "155mph**/1,900rpm ""168mph/1,800rpm""155mph**/2,900rpm""155mph**/2,900rpm"
Braking 70-0/60-0/30-0mph 45.3/33.2/8.8 metres43.7/33.2/8.6 metres43.9/32.1/8.1 metres46.2/34.1/8.5 metres
Noise levels outside/idle/30/70mph65/48/62/69db60/47/60/70db63/51/64/73db64/47/60/69db
Auto Express economy/range15.5mpg/225 miles15.0mpg/211 miles16.6mpg/230 miles 17.7mpg/245 miles
Govt urban/extra-urban/combined 13.5/30.7/21.1mpg16.8/34.0/24.8mpg15.8/30.7/22.8mpg13.7/30.1/20.9mpg
Actual/claimed CO2/tax bracket421/319g/km/35%435/270g/km/35%393/295g/km/35%369/324g/km/35%
Airbags/Isofix/park/rain sensorsSeven/yes/£605/yes10/yes/yes/yesSix/yes/yes^^/yesSix/yes/yes/no
Clim ctrl/elec/leather/heat seatsYes/yes/yes/yesYes/yes/yes/yesYes/yes/yes/£260Yes/yes/yes/yes
Elec roof/met paint/xenon lightsYes/yes/yes£800/yes/yes£675/yes/yes£850/yes/yes
Auto box/adaptive susp/keylessYes/£312^/noYes/yes/yes"£2,590/£1,295/£430"No/no/no
Sat-nav/DAB/aux input/Bluetooth£750/£320/yes/yesYes/no/yes/yesYes/£280/yes/£535£500/no/£175/£400
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