VW Phaeton 4.2 V8 335
Engine Tuning Belfast
VW Phaeton 4.2 V8 335 in Belfast. Standard and remapped figures for this exact engine.

- Fully dyno tested remaps
- 30 day money back guarantee
- Lifetime software warranty
- UK-wide local network
Remap stats
VW Phaeton 4.2 V8 335: standard vs remapped
Petrol engine. Indicative stage 1 figures, fully dyno tested.
Power
+22 bhp · +7%- Standard335 bhp
- Remapped357 bhp
Torque
+40 Nm · +9%- Standard430 Nm
- Remapped470 Nm
Tuning figures are indicative estimates, not guaranteed results. Actual results depend on the condition of the vehicle.
Prices from £130
Fully dyno tested | 30 day money back guarantee | Lifetime software warranty
The VW Phaeton 4.2 V8 335 produces 335 bhp and 430 Nm of torque as standard. After a stage 1 ECU remap in Belfast, our figures show 357 bhp and 470 Nm: a gain of 22 bhp (7%) and 40 Nm (9%).
Treat the numbers as a guide: they are stage 1 estimates for a petrol Volkswagen Phaeton in sound condition, and individual cars differ.
VW Phaeton 4.2 V8 335 power and torque after remapping
- Fuel: Petrol
- Standard power: 335 bhp, remapped: 357 bhp (+22 bhp, +7%)
- Standard torque: 430 Nm, remapped: 470 Nm (+40 Nm, +9%)
- Service: stage 1 ECU remap, fully dyno tested
How engine tuning works on a petrol Volkswagen Phaeton
Factory petrol calibrations leave margin for poor fuel and hot climates. A remap tunes the ignition, fuelling and boost maps to make better use of that margin, which shows up as livelier throttle response and stronger acceleration.
VW Phaeton 4.2 V8 335 against other Phaeton engines
Ranked by power gain against the other petrol Phaeton engines (3 in total), the VW Phaeton 4.2 V8 335 is 3rd, 12 bhp below the Phaeton petrol average of 34 bhp.
Across our whole catalogue the average petrol remap adds 27 bhp and 51 Nm, so this engine's 22 bhp and 40 Nm sits below that benchmark.
Remapping your Volkswagen Phaeton in Belfast
This is the Belfast site of the Remap Experts network, serving local drivers. We regularly work with drivers in Holywood, Newtownabbey, Millisle, Lisburn and Dunmurry and nearby areas of Northern Ireland.
Every remap is fully dyno tested and comes with a 30 day money back guarantee and a lifetime software warranty. Call 0800 779 7864 for a quote.
If you are closer to Glasgow, Scotland and Carlisle, those neighbouring Remap Experts sites can help too.

Want these figures on your VW Phaeton 4.2 V8 335?
Send your details and a specialist will confirm what is possible for your engine.
Included
What we can do for your Volkswagen Phaeton
Stage 1 ECU remap
Add power and torque and improve driveability. Software only, tailored to your engine.
ECU repair and testing
Is your engine control unit playing up? We can arrange testing and repair, and source replacement ECUs.
DPF and EGR fault repair
Persistent DPF or EGR errors diagnosed and resolved in accordance with all current road-legal standards.
Engine carbon cleaning
Fault finding and carbon cleaning for the inside of your engine, typically completed in a couple of hours.
From quote to remapped in four steps
No jargon and no pressure. Here is exactly what happens.
- 01
Find your vehicle
Choose your make, model and engine to see the standard and remapped power and torque for your car.
- 02
Request a quote
Send your details and we contact you by SMS or call back with a quote. No obligation.
- 03
Book with your local site
Your local Remap Experts site arranges the remap and answers any questions about your car.
- 04
Remapped and dyno tested
Your remap is fully dyno tested, with a 30 day money back guarantee and a lifetime software warranty.
Everything you need to know
Plain-English guides to how remapping works, what it does and what to check first.
- 6 min read
What is ECU remapping?
The engine control unit, what a remap changes, and who it suits.
Read guide - 5 min read
The benefits of ECU remapping
More torque, better driveability and the potential for better economy.
Read guide - 6 min read
How ECU remapping works, step by step
From reading the original software to the dyno test.
Read guide