List of May 2008 UK fuel economy ratings (N–S) List of May 2008 UK fuel economy ratings (N–S) List of May 2008 UK fuel economy ratings (N–S)

| Manufacturer | Model | Transmission | Engine_Capacity | Fuel_Type | L_100km_Urban_Cold | L_100km_Extra_Urban | L_100km_Combined | mpg_UK_Urban_Cold | mpg_UK_Extra_Urban | mpg_UK_Combined | mpg_US_Urban | mpg_US_Extra_Urban | mpg_US_Combined | CO_2_g_km | Green_Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Porsche | 911 | M6 | 3600 | Petrol | 18.8 | 9.5 | 12.8 | 15.0 | 29.7 | 22.1 | 12.5 | 24.7 | 18.4 | 307 | G |
| Porsche | 911 | M6 | 3600 | Petrol | 18.8 | 8.9 | 12.5 | 15.0 | 31.7 | 22.6 | 12.5 | 26.4 | 18.8 | 298 | G |
| Porsche | 911 | M6 | 3600 | Petrol | 19.8 | 8.9 | 12.8 | 14.3 | 31.7 | 22.1 | 11.9 | 26.4 | 18.4 | 307 | G |
| Porsche | 911 | A5 | 3600 | Petrol | 20.2 | 9.6 | 13.7 | 14.0 | 29.4 | 20.6 | 11.7 | 24.5 | 17.2 | 328 | G |
| Porsche | 911 | M6 | 3600 | Petrol | 19.2 | 9.5 | 12.9 | 14.7 | 29.7 | 21.9 | 12.2 | 24.7 | 18.2 | 309 | G |
| Porsche | Cayman S | M6 | 3387 | Petrol | 15.3 | 7.8 | 10.6 | 18.5 | 36.2 | 26.6 | 15.4 | 30.1 | 22.1 | 254 | G |
| Porsche | Cayman S | A5 | 3387 | Petrol | 16.3 | 7.9 | 11.0 | 17.3 | 35.8 | 25.7 | 14.4 | 29.8 | 21.4 | 262 | G |