Facts and figures
Porsche Cayenne S Diesel vs BMW X5 M50d
| Porsche Cayenne S Diesel | BMW X5 M50d | |
| On the road price/total as tested | £59,053/£75,129 | £60,815/£73,985 |
| Residual value (after 3yrs/36,000) | N/A | £31,441/51.7% |
| Depreciation | N/A | £29,374 |
| Annual tax liability std/higher rate | £4,077/£8,154 | £4,100/£8,201 |
| Annual fuel cost (12k/20k miles) | £2,574/£4,289 | £2,751/£4,586 |
| Ins. group/quote/road tax band/cost | 49/£1,015/K/£280 | 50/£1,092/J/£260 |
| Servicing cost | £150-£450* | £350 (5yrs/60k) |
| Length/wheelbase | 4,846/2,895mm | 4,857/2,933mm |
| Height/width | 1,699/1,939mm | 1,766/2,010mm |
| Engine | V8/4,134cc | 6cyl in-line/2,993cc |
| Peak power/revs | 377/3,750 bhp/rpm | 376/4,000 bhp/rpm |
| Peak torque/revs | 850/2,000 Nm/rpm | 740/2,000 Nm/rpm |
| Transmission | 8-spd auto/4WD | 8-spd auto/4wd |
| Fuel tank capacity/spare wheel | 85 litres/sealant | 85 litres/run flat |
| Boot capacity (seats up/down) | 670/1,780 litres | 620/1,750 litres |
| Kerbweight/payload | 2,195/740kg | 2,225/680kg |
| Turning circle/drag coefficient | 11.9 metres/0.36Cd | 12.8 metres/0.34Cd |
| Basic warranty (miles)/recovery | 3yrs (unltd)/2yrs | 3yrs (unltd)/3yrs |
| Service intervals/UK dealers | 20,000 miles/36 | Variable/148 |
| Driver Power manufacturer/dealer pos. | 13th/5th^ | 15th/16th^ |
| Euro NCAP: Adult/child/ped./stars | N/A | N/A |
| 0-60/30-70mph | 5.3/4.9 secs | 5.5/5.2 secs |
| 30-50mph in 3rd/4th | 2.1/3.2 secs | 2.1/2.5 secs |
| 50-70mph in 5th/6th/7th | 3.4/4.3/6.8 secs | 3.4/4.6/5.9 secs |
| Top speed/rpm at 70mph | 156mph/1,400rpm | 155mph/1,400rpm |
| Braking 70-0/60-0/30-0mph | 44.6/35.3/9.8m | 44.6/35.3/9.8m |
| Auto Express econ (mpg/mpl)/range | 29.3/6.5/548 miles | 27.4/6.1/512 miles |
| Govt urban/extra-urban/combined | 28.2/38.7/34.0mpg | 32.1/41.5/37.7mpg |
| Govt urban/extra-urban/combined | 10.0/7.3/8.3mpl | 8.8/6.8/7.5mpl |
| Actual/claimed CO2/tax bracket | 258/218g/km/35% | 276/199g/km/34% |
| Airbags/Isofix/cruise control | Six/yes/yes | Six/yes/yes |
| Electric/leather/heated seats | Yes/yes/£295 | Yes/yes/£305 |
| Hill descent/adapt dampers/met paint | Yes/£1,052/£696 | Yes/£1,650/yes |
| Parking sensors/reversing camera | Yes/£1,044** | Yes/£530 |
| Sat-nav/DAB radio/Bluetooth | £2,157/£324/£534 | £1,925/yes/£585 |
