Reconditioned · Used · Rebuilt
428PS 4.2 Supercharged Engine for Sale
The 428PS is the 4.2-litre supercharged V8 fitted to the first-generation Range Rover Sport (L320) and Jaguar XF. We supply fully tested reconditioned and low-mileage used units with a 12-month / 12,000-mile parts-and-labour warranty.
Which Vehicles Use the 428PS
Variants differ by year and model — we confirm the exact variant from your reg before quoting.
| Vehicle | Years | Variant / output | Matching engines |
|---|---|---|---|
| Range Rover Sport (L320) | 2005–2009 | 4.2 S/C 390 bhp | View engines → |
| Jaguar XF (X250) | 2008–2009 | 4.2 S/C 416 bhp | View engines → |
What's Replaced When We Recondition a 428PS
Unless your quote says otherwise, a reconditioned engine is supplied as a bare assembly — block, head(s) and sump — rebuilt with the following as standard. Your original ancillaries are refitted, and we tell you at the health check if any are worn, with an itemised list to approve or decline before we fit them.
- Cylinder head(s) — pressure-tested, with refaced valves and seats
- Valve stem seals — new
- Head gasket(s) — new, with new head bolts
- Piston rings — new
- Main & big-end bearings — new
- Crankshaft — inspected, and reground or replaced as required
- Oil pump — new
- Timing belt or chain kit — new
- Testing — pressure and compression tested; results supplied in writing
- Ancillaries — your originals refitted; anything worn is itemised for you to approve or decline
Known 428PS Failure Modes
Supercharger wear
Nose bearing and coupler wear present as a whine that rises with revs.
Book diagnostics →Cooling & overheating
Failed thermostats and water pumps can cause head damage if ignored.
Book diagnostics →428PS Prices & Lead Times
| Compare | Most popularReconditioned | Low-Mileage Used | Rebuild Your Engine |
|---|---|---|---|
| Fitted, from | £2,500–£5,000 | £1,000–£2,500 | £2,000–£5,000 |
| VAT | Included | Included | Included |
| Warranty | 12 mo / 12,000 mi | 12 mo / 12,000 mi | 12 mo / 12,000 mi |
| Lead time | 3–5 days | In stock: 2 days | 2–3 weeks |
428PS Questions
How much does a replacement 428PS engine cost, fitted?
Fitted at our workshop, a low-mileage used 428PS typically runs £1,000–£2,500, a reconditioned unit £2,500–£5,000, and a full rebuild of your own engine £2,000–£5,000. The exact figure depends on the variant and what the strip-down reveals. All our prices include VAT (GB 502 3788 04). Enter your reg above for a fixed written quote.
Do you supply the 428PS on its own?
No. Every engine we supply is fitted by us, at our own workshop in Grays, Essex. That is deliberate: one party is then responsible for both the engine and the fitting, which is what makes the warranty worth having. If you cannot get to us, we can collect your vehicle and deliver it back.
What warranty comes with a 428PS?
12 months or 12,000 miles, whichever comes first — parts and labour, in writing. Servicing can be done by us or by any established professional garage; you are not required to come back to us.
Is the 4.2 supercharged worth rebuilding?
For an L320 Sport it often is — a reconditioned unit typically costs far less than the vehicle's replacement value. We'll be straight with you either way.
What a Fitted 428PS Includes
Every 428PS we supply is fitted by us at our Grays, Essex workshop — never sold loose. Your price covers the whole job:
- The engine — reconditioned, tested low-mileage used, or your own unit rebuilt, matched to your exact variant
- Removal & fitting — the old engine out, the replacement in, by JLR specialists
- Fluids, filters & adaptation — the parts and coding the job actually needs, not billed as extras
- A documented road test — before the car comes back to you
- 12 months / 12,000 miles, parts & labour — one warranty covering the engine and the workmanship
Turnaround depends on the engine — see the lead times in the options above. VAT is included in every price.
Not local to Essex? It makes no difference to the engine or the warranty. We collect your vehicle, fit the 428PS here, and return it — wherever you are in the UK. Here's how nationwide collection & delivery works.
Your 428PS Quote in Two Hours
A fixed written price to supply and fit it — from the people who'll actually build your engine. VAT included.
Get My 428PS Quote →Or call 02033 180532 · Mon–Fri 8am–6pm · Sat 9am–1pm