Scania P420 2006> 11.7l EUR 3 DC 12 14 - HPI 420bhp remap figures
The Scania P420 11.7l EUR 3 DC 12 14 - HPI 420bhp (2006>) is a diesel 11.7L model making 420bhp and 2100Nm as standard. After a Stage 1 ECU remap we expect 485bhp and 2376Nm - up to 65bhp and 276Nm more than stock.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 420 bhp | 485 bhp | +65 bhp |
| Torque | 2100 Nm | 2376 Nm | +276 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 420 bhp | 2100 Nm | |
| Stage 1Maximum software-only performance | 485 bhp | 2376 Nm | +65 bhp +276 Nm |
| Stage 1 EcoPerformance with economy in mind | 469 bhp | 2354 Nm | +49 bhp +254 Nm |
| Eco mapEconomy first | 464 bhp | 2340 Nm | +44 bhp +240 Nm |
Who is the Stage 1 map for?
- Drivers who want stronger pulling power for overtaking, hills and towing, with no parts to fit.
- Daily and motorway drivers who want the engine to feel less strained at cruising speed.
- Anyone who wants the biggest software-only change we list for this engine.
What this means for your P420
On a diesel the biggest change is normally torque: the remap changes how much fuel and boost the ECU allows across the rev range, so pulling power arrives earlier and holds on longer.
The ECU recorded for this variant is a Motorola EMS S6. We read the ECU on your car and compare it with the software listed here before any work starts, so you know what to expect before you commit.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the Scania P420 11.7l EUR 3 DC 12 14 - HPI 420bhp?
We expect 485bhp and 2376Nm against 420bhp and 2100Nm as standard: up to +65bhp and +276Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the Scania P420 11.7l EUR 3 DC 12 14 - HPI 420bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 469bhp and 2354Nm expected. The Eco map is economy first: 464bhp and 2340Nm. Both still sit above the standard 420bhp and 2100Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Scania P420 figures
Other diesel variants
All diesel P420 variants · P420 2006> overview · All Scania figures