It has appointed Superchips, provider of engine management system tuning, to convert the Land Rover Discovery Td5.
Maximum power is now 173bhp at 4,749rpm, an increase of 28bhp over the vehicle's original figure, while slightly higher up the rev range, at 4,922rpm, an even greater increase of 45bhp is achieved.
Similarly, peak torque is now 239lb-ft at 2,664rpm, an improvement of 25lb-ft on the original, and the biggest difference, a gain of 40lb-ft, is delivered at 3,011rpm.
The Land Rover is used for advanced driver training by Warwickshire Fire and Rescue's Industrial and Commercial Training Unit (ICTU).
Paul Hodges, driving instructor and Driving Standards Agency examiner for the ICTU, said: 'There has been no adverse effect on fuel economy. The extra power and torque is useful for our five-day defensive driving course. Every three years, our officers are reassessed to make sure they are still up to standard and the Superchipped Land Rover really puts them through their paces.'
The power increase cost £511.13 including VAT.