FAQ - Terms
01. Is it ok if I don't have a track focused vehicle?

Absolutely, this is the main purpose of VPR. As long as your vehicle is well maintained and performs consistently, it should enable you to focus solely on your driving.

02. Does a better lap time give me more odds for a good Driving Score ?

It certainly does.

03. With what kind of vehicles will VPR work?

At the moment in all cars, motorcycles, go-karts, and trucks. Check terms 7.2 and 7.3 for some Driving Score related exceptions.

04. Any high Driving Score tips?

Use a certified instructor and in case you feel fading on your brakes, tyres, or engine power, cool down your vehicle and stop your session. After any issues have been resolved try a new session where you will have more chances for a better Driving Score.


05. Any high Driving Score technical tips?

A solid, balanced and reliable vehicle can provide consistent performance and more odds for high Driving Scores. Also consider using a vehicle that suits your driving skills.

06. My lap time is worse than the previous session but my Driving Score is better. Why this happened?

This might happen for various reasons but most probably the overall grip level due to track conditions or tyre wear may be lower which results in a less capable vehicle. You were awarded a better Driving Score because you managed to use more efficient the currently available vehicle capabilities. 

07. My session was ranked as Invalid. Why has this happened?

This might happen if the VPR algorithm realises that the actual performance of the vehicle does not match the data collected during this session.

08. Can I compare Driving Scores from different race tracks?

In many cases yes but there are some occasions where the morphology of different routes vary significantly. Therefore, VPR’s recommendation is to compare and use as reference Driving Scores from the same track.

09. What if the user is not able to push his vehicle at it's limits?

In this case a low Driving Score will be provided due to a relatively slow lap time. If the user drives slow, up to a certain extend, the driving session will be marked as INVALID.

10. What happens if the user is trying to "cheat" the algorithm by trying to achieve less lateral grip?

In most cases the VPR algorithm will identify any intention for cheating and will mark the driving session as INVALID. Even if the VPR algorithm could not do so, it is almost impossible to drive consistently on a specific grip level so the Driving Score will be lower than the one which could be achieved if the driver was trying to reach the vehicle’s limits.

11. What is the VPR Vehicle Capability (VC) ?

The VPR VC is an index number that indicates the performance of the vehicle for the given track and conditions.


All “Vehicle Performance Rating” [VPR] Leisure users shall follow the Organiser’s rules and stay away from any kind of wheel to wheel competition among themselves. If it is clearly established that these rules have been broken, the user may be Disqualified [DSQ].


Fair play is the No1 fundamental value of “Vehicle Performance Rating” [VPR].

2.1  Users shall proceed in compliance with all recognized principles of sportsmanship and fair play.

2.2  The fairness and accuracy of “Vehicle Performance Rating” [VPR] is related to the live data which the Device collects. Users should aim for the best performance that the driver/vehicle combination can achieve under the certain circumstances. If it is clearly established that these principles have been violated on purpose, the user may be Disqualified [DSQ] for a certain session, or even the entirety of the event.


All those who use “Vehicle Performance Rating” [VPR] do so at their own risk and responsibility. Each user or, in the case of minors or persons who do not have full legal capacity and liability, the responsible adult agrees and acknowledges that:

3.1  They are aware of the inherent element of risk involved in the sport and accept responsibility for the exposure of themselves, others, other property and their own vehicle to such inherent risk whilst using VPR.

3.2  They are solely liable and responsible for the safety of themselves, their vehicle and their other properties.

3.3  They accept responsibility for any injury, damage and indirect damage.

3.4  Their vehicle is in good order, properly maintained and they are officially licenced, fit and healthy to drive the vehicle that has been fitted with a VPR device.

3.5  VPR bears no responsibility or liability for any injury, damage, indirect damage or loss to the extent that such occurred while using any aspect, characteristic, mechanism or item otherwise related with Vehicle Performance Rating and the equipment that Vehicle Performance Rating provides and/or is connected with.

3.6  They accept the VPR results.

3.7  They accept that VPR may update the software, firmware, or hardware that VPR use.


“Vehicle Performance Rating” [VPR] works on any kind of car, kart, motorbike or truck where the GNSS device has been properly fitted.


5.1  Lap. This is the actual lap number.

5.2  Driving Score [%]. This is the Driving Score of the lap.

5.3  Lap time [m]. This is the logged time of the lap.

5.4  Min Apex Speed [km/h]. This is the minimum logged speed during the lap.

5.5  Max Speed [km/h]. This is the maximum logged speed during the lap.

5.6  Distance [metres]. This is the covered distance during the lap.

5.7  Acceleration [g]. This is the average of the best longitudinal accelerations, at the straight lines of the session or the lap.

5.8  Lateral [g]. This is the maximum sustained lateral grip of the session or the lap.

5.9  Braking [g]. This is the maximum sustained deceleration of the session or the lap.

6.  VC [index].  This is the vehicle capability index of the session or the lap.



6.1 ASTERISK. VPR realised that the actual performance of the vehicle may not match the data collected during this session. [*] at Driving Score number.

6.2 LOW ACC. Low GNSS accuracy. Only Lap time is provided.

6.3 INVALID. Τhe VPR algorithm realised that the actual performance of the vehicle does not match the data collected during this session. Only Lap time, Min apex speed, Max speed and Distance are provided.

6.4 TRACK LIMIT. Track limits violation. No results are provided.

6.5 INVALID (DISTANCE). Not enough data, less than 2500m driven during the driving session.


 “Vehicle Performance Rating” [VPR] is designed to provide a unique combination of data at a high level of accuracy. However the accuracy of Driving Score and Diff (Gap) may be compromised at some extent in the cases listed below:

7.1  Significantly different traction level on specific part of the track. Reasons might include a very bumpy section, a part of the course where there has been a liquid spill, a very wet spot while the rest of the route is dry, etc. [possibility for strict Driving Score].

7.2  Vehicles that due to their downforce, can produce significantly different lateral grip levels among turns of the specific track. Usually at vehicles that exceed 2.5g Maximum Sustained Lateral Grip.

7.3  Users who for any reason don’t feel comfortable pushing their vehicle close to its limits. Usually this can happen when they are not familiar with the track, or with the vehicle, or a combination of the two.

7.4  Laps with traffic.

7.5  Sessions with “short shifting”


8.1 Current version: 1.9.5

Active Duration: 29/4/2022, 00:01am UTC time-now


  • VC

8.2 Software update applies in every further VPR action. All existing Personal, Overall and VPR League results are updated accordingly.

8.3 Previous version: 1.9.

Active duration: 1/9/2021 – 28/4/2022