FAQ - Terms
01. What is the meaning of the red and orange lines of Ayrton AI Coaching?

The lines depict the exact track areas where the most time can be gained by improving the driving or the vehicle setup. The section might be the entry, the apex, or the exit of turn, or even a combination of them. Ayrton will indicate one area with red and one with orange colour, where red is the area in which the most time can be shaved off.

02. How does Ayrton AI Coaching work?

The VPR AI algorithm identifies and simulates the perfect lap your vehicle could achieve at the specific session and track. It then compares your session’s best lap with the perfect simulated lap and provides you with the areas of the track where you can improve the most.

03. Which factors affect the vehicle's Acceleration figure?

The Acceleration is being affected by the power to weight ratio, Cd (drag coefficient), gear ratio, slipstreaming, tire pressures and alignment.

04. Does the slipstreaming affect the vehicle Acceleration and the Driving Score?

Yes, the slipstreaming results in higher Acceleration figures. Also if the slipstreaming is not consistent, it may result in lower Driving Scores.

05. 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. The bigger the number is, the faster the vehicle is at the specific track.

06. How can I compare two different laps using the VPR data ?

A downloadable .vbo file is available for every session providing the driving data graphs in order to further analyse or compare different laps.

07. 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.

08. Does a better lap time give me more chances for a good Driving Score ?

Given that you have the same or worse vehicle capabilities, a better lap time will result in a better Driving Score.

09. My lap time is worse than the previous session but my Driving Score is better. Why did this happen?

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 efficiently the currently available vehicle capabilities.

10. 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.


11. Any high Driving Score technical tips?

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

12. What happens if the driver produces less or more Lateral g due to his driving style?

The VPR algorithm is able to identify multiple driving styles and therefore to provide accurate Lateral g information regardless of the driving style. Obviously a minimum driving effort is required and as it is known, the power of a tool lies in the hands of its user.

13. 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 extent, the driving session will be marked as INVALID.

14. With what kind of vehicles will VPR work?

At the moment VPR works with all cars, motorcycles, go-karts, e-scooters and trucks. Check terms 7.2 and 7.3 for some Driving Score related exceptions.

15. 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.

16. Where can VPR be used?

VRP can be used at Racetracks, Autocross events, Hillclimbs and more or less at any closed course circuit.


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:

1.1  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.

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

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

1.4  Their vehicle is in good order, properly maintained and they are officially licenced, fit and healthy to drive the vehicle.

1.5  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, data, mechanism or item otherwise related with Vehicle Performance Rating and the equipment that Vehicle Performance Rating provides and/or is connected with.

1.6  They accept the VPR results.

1.7  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, e-scooter or truck where the GNSS device has been properly fitted.


3.1  Lap. This is the actual lap number.

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

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

3.4  Min Apex Speed [km/h]. This is the minimum logged speed at the turn of the smallest ratio during the lap.

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

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

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

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

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

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

3.11  AI Coaching [Ayrton].  Advanced insight of the two turns of the track where the driver can gain the most time by improving his driving or the vehicle setup.


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

4.2 LOW GPS. Low GNSS accuracy. Only Lap time, Speed and Distance are provided.

4.3 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.

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

4.5 INVALID (DISTANCE). Not enough data, 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:

5.1  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].

5.2  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.

5.3  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.

5.4  Laps with traffic.

5.5  Sessions with “short shifting”


6.1 Current version: 1.9.6

Active Duration: 29/11/2022, 00:01am UTC time-now


  • Lateral calculation for tracks longer than 2000m
  • Ayrton AI Coaching

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

6.3 Previous version: 1.9.5

Active duration: 29/4/2022 – 28/11/2022