Facts and figures
| Porsche 911 Carrera 4S PDK | Audi R8 V8 Coupe S tronic | |
| On the road price/total as tested | £91,001/£100,159 | £94,475/£96,361 |
| Residual value (after 3yrs/36,000) | TBC | £50,355/53.3% |
| Depreciation | TBC | £44,120 |
| Annual tax liability std/higher rate | £6,143/£12,287 | £6,537/£13,075 |
| Annual fuel cost (12k/20k miles) | £2,914/£4,856 | £3,471/£5,786 |
| Ins. group/quote/road tax band/cost | 48/£1,839/K/£270 | 50/£2,066/M/£475 |
| Cost of 1st/2nd/3rd service | £265/£395/£265 | £111 a month (3yrs) |
| Length/wheelbase | 4,491/2,450mm | 4,440/2,650mm |
| Height/width | 1,296/1,852mm | 1,252/1,904mm |
| Engine | Flat 6cyl/3,800cc | V8/4,163cc |
| Peak power/revs | 395/7,400 bhp/rpm | 424/7,900 bhp/rpm |
| Peak torque/revs | 440/5,600 Nm/rpm | 430/4,500 Nm/rpm |
| Transmission | 7-spd PDK/4wd | 7-spd S tronic/4wd |
| Fuel tank capacity/spare wheel | 68 litres/sealant | 90 litres/sealant |
| Boot capacity | 125 litres | 100 litres |
| Kerbweight/payload | 1,465/430kg | 1,585/300kg |
| Turning circle/drag coefficient | 11.1 metres/0.30Cd | 11.4 metres/0.35Cd |
| Basic warranty (miles)/recovery | 3yrs (60,000)/3yrs | 3yrs (60,000)/3yrs |
| Service intervals/UK dealers | 20,000 (2yrs)/36 | Variable/121 |
| Driver Power manufacturer/dealer pos. | 9th/5th | 15th/18th |
| 0-60/30-70mph | 4.6/3.4 secs | 4.7/3.6 secs |
| 30-50mph in 3rd/4th | 3.5/4.6 secs | 2.5/4.0 secs |
| 50-70mph in 5th/6th | 5.4/9.0 secs | 5.2/7.3 secs |
| Top speed/rpm at 70mph | 184mph/2,000rpm | 187mph/2,000rpm |
| Braking 70-0/60-0/30-0mph | 51.0/37.7/9.5m | 49.0/37.0/9.9m |
| Noise outside/idle/30/70mph | 75/58/54/74dB | 70/53/66/74dB |
| Auto Express econ (mpg/mpl)/range | 24.9/5.5/372 miles | 20.9/4.6/414 miles |
| Govt urban/extra-urban/combined | 22.4/40.1/31.0mpg | 14.6/33.6/22.8mpg |
| Govt urban/extra-urban/combined | 5.0/8.9/6.9mpl | 3.2/7.5/5.1mpl |
| Actual/claimed CO2/tax bracket | 262/215g/km/34% | 312/289g/km/35% |
| Adaptive damping/cruise control | Yes/£267 | £1,175/£225 |
| Airbags/Isofix/rear parking sensors | Six/yes/yes | Four/yes/£670 |
| Climate control/electric/heated seats | Yes/yes/£320 | Yes/£850/yes |
| Metallic paint/xenons/ceramic brakes | £801/yes/£5,787 | £715/LED/£7,295 |
| Sat-nav/USB connection/Bluetooth | Yes/yes/£558 | Yes/yes/yes |
