Jaguar XJ XJ (X350) 4.2 petrol 406PS
4.2 petrol 406PS is one engine in the Jaguar XJ XJ (X350). Power, economy, and CO₂ below are ranges where the trims or gearboxes differ. Each row in the variant table is one configuration.
Engine summary
- Fuel
- Petrol
- Power
- 405.6 PS
- Combined mpg
- 22.3–23.4 mpg
- CO₂
- 289–299 g/km
- Variants
- 5 variants
- UK dataset
- 150 cars in our dataset
Catalogue registration span: 1997 – 2023. This is the span of records, not a production announcement.
Where this engine is offered
Variants with this engine
5 published variants.
NEDC combined mpg
| Variant | Fuel | Gearbox | Body | Power | Combined mpg | Dataset |
|---|---|---|---|---|---|---|
| V8 R 4.2 petrol 406PS | Petrol | Automatic | Saloon | 405.6 PS (400 bhp) | 22.3 mpg (NEDC) | 75 |
| V8 Super 4.2 petrol 406PS | Petrol | Automatic | Saloon | 405.6 PS (400 bhp) | 22.3 mpg (NEDC) | 26 |
| V8 Super Lwb 4.2 petrol 406PS | Petrol | Automatic | Saloon | 405.6 PS (400 bhp) | 23.3 mpg (NEDC) | 13 |
| Xjr 4.2 petrol 406PS | Petrol | Automatic | Saloon | 405.6 PS (400 bhp) | 23.4 mpg (NEDC) | 24 |
| Xjr Portfolio Ltd Edition 4.2 petrol 406PS | Petrol | Automatic | Saloon | 405.6 PS (400 bhp) | 23 mpg (NEDC) | 12 |
Other engines in this generation
Mpg ranges are not ranked across engines because the test cycle is stored on the variant, not on the engine range.
| Engine | Fuel | Power | Combined mpg range | CO₂ range | Dataset |
|---|---|---|---|---|---|
| 2.7 diesel 207PS | Diesel | 206.7–206.9 PS | 34.9–35.8 mpg | 209–214 g/km | 184 |
| 2.7 diesel 208PS | Diesel | 208.1 PS | 34.9 mpg | 214 g/km | 117 |
| 3.0 diesel 279PS | Diesel | 278.9 PS | 43.5 mpg | 159–167 g/km | 369 |
| 3.0 petrol 238PS | Petrol | 237.9 PS | 26.9 mpg | 249 g/km | 75 |
| 3.0 petrol 243PS | Petrol | 243.4 PS | 26.9 mpg | 249 g/km | 262 |
| 3.6 petrol 266PS | Petrol | 265.7 PS | 26.4 mpg | 254 g/km | 81 |
| 4.2 petrol 304PS | Petrol | 304.2 PS | 25.9 mpg | 264–269 g/km | 137 |
Related VehicleScore tools
Check your Jaguar XJ (X350) 4.2 petrol 406PS
Enter a UK registration to check a Jaguar XJ 4.2 petrol 406PS. This page describes that engine, not one number plate.
How these figures are produced
Specifications and counts come from the VehicleScore UK vehicle catalogue. A count of cars is the number of records in that dataset. It is not UK production, not sales, and not the number of cars currently on the road.
Power is shown in PS where the catalogue stores PS, and in bhp only where bhp is stored separately. Official fuel economy is labelled NEDC or WLTP when the test cycle is known. Figures from different cycles are not ranked together. Empty values are left blank.
The catalogue does not store a revision date, so these pages do not show a last-updated day.