Both diesel and petrol engines can be remapped, but the results and priorities differ. Turbocharged diesel engines generally have more headroom: greater torque gain at low RPM and more fuel saving. Turbocharged petrol engines also respond very well, with significant power gains and improved throttle response.
Diesel remap specific benefits:
• Torque gain of up to 40% at low and mid RPM, the most useful range for trucks and vans
• Fuel savings of 8-15% (sometimes up to 20%)
• Better towing and hill performance
• Less gear-changing and more relaxed driving
Particularly effective for trucks, vans and any high-mileage vehicle where fuel cost is a major expense.
Petrol turbo remap specific benefits:
• Power increase typically 20-30% for Stage 1
• Sharper, more immediate throttle response
• Stronger mid-range pull
• Improved driving satisfaction
Less fuel saving than diesel but often a more dramatic subjective performance improvement. Popular for performance-oriented cars and vans.
Yes, atmospheric petrol engines can be remapped, but with less headroom than turbos. Gains typically range from 5% to 12%, mainly in response and smoothness. If your non-turbo petrol engine needs significantly more performance, a Stage 2 with mechanical upgrades (exhaust, intake, cams) would be more effective.
Diesel remapping generally delivers better ROI because of the fuel saving component. A diesel Stage 1 remap often pays for itself within a year through fuel savings alone, especially for high-mileage users. Petrol remapping offers more immediate performance satisfaction but without the same fuel economy dividend. For fleet and commercial operators, diesel remapping is almost always the smarter financial choice.
Hybrid and mild-hybrid engines can often be partially remapped (the combustion engine component), though the gains are typically smaller and the process more complex due to the interaction with the electric drivetrain. Contact us to discuss your specific hybrid model. We assess each case individually.