Mercedes SLS Roadster vs Porsche 911 - specifications
| Mercedes SLS AMG Roadster | Porsche 911 Turbo Cabrio PDK | |
|---|---|---|
| On the road price/total as tested | £176,895/£195,865 | £120,403/£124,926 |
| Residual value (after 3yrs/36,000) | £76,949/43.5% | £45,272/37.6% |
| Depreciation | £99,946 | £75,131 |
| Annual tax liability std/higher rate | £12,309/£24,618 | £8,354/£16,709 |
| Annual fuel cost (12k/20k miles) | £4,236/£7,060 | £3,496/£5,826 |
| Ins group/quote/road tax band/cost | 50/N/A/M/£460 | 50/N/A/M/£460 |
| Cost of 1st/2nd/3rd service | N/A | £550/£1,250/£550 |
| Length/wheelbase | 4,638/2,680mm | 4,450/2,350mm |
| Height/width | 1,261/1,939mm | 1,300/1,852mm |
| Engine | V8/6,208cc | Flat-six/3,800cc |
| Peak power/revs | 563/6,800 bhp/rpm | 493/6,000 bhp/rpm |
| Peak torque/revs | 650/4,750 Nm/rpm | 650*/1,950Nm/rpm |
| Transmission | 7-spd dual-clutch/rwd | 7-spd dual-clutch/4wd |
| Fuel tank capacity/spare wheel | 85 litres/sealant | 67 litres/sealant |
| Boot capacity | 173 litres | 105 litres |
| Kerbweight/payload | 1,735/225kg | 1,670/350kg |
| Turning circle/drag coefficient | 11.9 metres/N/A | 10.9 metres/0.32Cd |
| Basic warranty/recovery | 3yrs unltd/30yrs | 2yrs unltd/2yrs |
| Service intervals/UK dealers | Variable/136 | Variable/34 |
| Driver Power manufacturer/dealer pos. | 10th/10th | 5th/5th |
| Euro NCAP: Adult/child/ped./stars | N/A | N/A |
| 0-60/30-70mph | 4.2^/3.0 secs | 3.1/2.6 secs |
| 30-50mph 3rd/4th | 2.1/2.9 secs | 1.9/2.9 secs |
| 50-70mph 5th/6th/7th | 3.6/5.0 secs/N/A | 3.0/3.9/6.7 secs |
| Top speed/rpm at 70mph | 197mph/2,400rpm | 194mph/2,000rpm |
| Braking 70-0/60-0/30-0mph | 54.6/40.9/10.2m^ | 45.2/33.2/8.3m |
| Noise level roof up 30/70/down 30/70 | 59/67/62/72dB | 64/71/66/77dB |
| Auto Express economy/range | 17.0mpg/318 miles | 20.6mpg/304 miles |
| Govt urban/extra-urban/combined | 14.2/30.4/21.4mpg | 16.9/34.4/24.6mpg |
| Actual/claimed CO2/tax bracket | 384/308g/km/35% | 317/270g/km/35% |
| Airbags/parking sensors/camera | Eight/yes/yes | Six/£238/no |
| Adaptive dampers/stability/cruise ctrl | No/yes/yes | Yes/yes/£299 |
| Memory/leather/heated seats | Yes/yes/yes | £688/yes/£295 |
| Met. paint/xenons/tyre pressure sens | Yes/yes/yes | Yes/yes/yes |
| Sat-nav/USB connection/Bluetooth | Yes/yes/yes | Yes/yes/yes |
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