Considering an ECU remap for your Scania Trucks R-Series 420? A Stage 1 remap can take this All diesel engine from 420 BHP to 500 BHP and from 2100 Nm to 2460 Nm of torque (turbocharged). This engine scores 7/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Scania Trucks R-Series can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Scania Trucks R-Serie 420 is a turbocharged diesel engine producing 420 BHP and 2100 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 500 BHP and 2460 Nm — a gain of around 80 BHP (19%) and 360 Nm (17%).
This engine has moderate remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as moderate, based on the percentage gain available from the factory output.
Considerations: High tuned torque: check transmission torque capacity and service history.
Fuel economy note: possible improvement with conservative driving.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain |
|---|
| Torque |
|---|
| Gain |
|---|
| Score |
|---|
| 230 | 230 → 265 | +35 | 1050 → 2110 | +1060 | Excellent (8/10) |
| 270 | 270 → 310 | +40 | 1250 → 1410 | +160 | Good (6.5/10) |
| 310 | 310 → 355 | +45 | 1550 → 1785 | +235 | Good (6.5/10) |
| 340 | 340 → 390 | +50 | 1700 → 1955 | +255 | Good (6.5/10) |
| 380 | 380 → 450 | +70 | 1900 → 2185 | +285 | Good (7/10) |
| 440 | 440 → 475 | +35 | 2300 → 2600 | +300 | Good (6.5/10) |
| 450 | 450 → 510 | +60 | 2350 → 2750 | +400 | Good (7/10) |
| 470 | 470 → 560 | +90 | 2200 → 2650 | +450 | Good (7/10) |
| 480 | 480 → 560 | +80 | 2250 → 2670 | +420 | Good (7/10) |
| 500 | 500 → 595 | +95 | 2400 → 2850 | +450 | Good (7/10) |
| 520 | 520 → 580 | +60 | 2700 → 3100 | +400 | Good (6.5/10) |
| 560 | 560 → 655 | +95 | 2700 → 3130 | +430 | Good (7/10) |
| 580 | 580 → 670 | +90 | 2750 → 3181 | +431 | Good (7/10) |
| 620 | 620 → 670 | +50 | 3000 → 3380 | +380 | Good (6.5/10) |
| 730 | 730 → 850 | +120 | 3600 → 4040 | +440 | Good (6.5/10) |
Get a personalised remap quote for your Scania Trucks R-Series. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.
