Log In / Sign Up

Top Gear Test Track (Dunsfold)

Godalming, Surrey, England
View maps as JPEGs here
Back to Map
MX-5 Miata
911 GT3 RS 4.0
Yamaha FZ1
F1 Car
1.23 MI
1.98 KM
full browser
Hide Tools
Double click or press Esc to exit full screen
Loading Map...
Loading markers...
*PLEASE NOTE* The racing lines and simulations shown here are based on a simplified analysis that does not incorporate 3D effects such as camber and elevation, track irregularities, or surface conditions. It assumes perfect grip and perfect pilot control. Always temper your approach to a racetrack with common sense and an awareness of your skill level. Be safe out there!
tags Tags allowed: <b> <em> <strike> <a>
Lap Times Explained

Each column represents a vehicle driven on different racing lines. For example, the first row of the first column is the time for the Miata driven on its own line. The second row represents the Miata driven on the Porsche's racing line, and so on. It is expected that when a vehicle is driven on its own line (large font) the lap time will be the quickest. Otherwise, Al has not done his job very well.

Line Miata GT3 RS Moto F1 beta
Miata 1'24.56 +1.30 +2.76 +0.38
GT3 RS +0.86 1'11.07 +1.46 +0.66
Moto -0.06 -0.68 1'12.62 +0.22
F1 +1.30 +1.94 +3.23 48.03

    No additional resources at this time.
Suggest a resource or video

Top Gear Test Track (Dunsfold)

clear form max 500 characters

Resource Guidelines

You are welcome to suggest a resource for Top Gear Test Track (Dunsfold). Valuable resources include:
  • YouTube videos
  • Websites
  • PDFs
Resources which are excellent demonstrations or discussions of the racing line at this circuit will be added to the page. Thank you for contributing!

The Racing Line at Top Gear Test Track (Dunsfold)

Immortalized by the automotive pop culture phenomenon Top Gear, the Stig's lap time around this shoddy little test track built into Dunsfold Aerodrome has become one of the most recognizable measuring sticks in cardom. Several corners at Dunsfold are indicated by nothing more than painted lines, which means that we have to trust that no corner cutting takes place. The addition over time of concrete curbing around some corners further invalidates direct comparisons of lap times. And never mind the evidential basis for the Stig's automotive prowess and consistency amounts to little more than marketing... None of this matters. The Top Gear lap time is here to stay as a benchmark for car performance and prestige.

In true top gear fashion, the vehicles are modeled as taking a standing start. Speeds are therefore not overwhelming through Crooner, which is more of a setup for Wilson. Two approaches are usable there: the FZ1 and GT3 RS stay close to the first apex and don't swing out much farther than mid-track before turning in. The F1 and Miata miss the first apex and set up all the way to the outside of track. You'll often see the Stig far to the outside very early in the exit of Wilson, but Al recommends cutting the distance down and keeping the drive strong by staying a little closer to the left.

There's a leftward kink painted in before entering Chicago, which the casual Dunsfold driver will ignore, but the Stig does not. The GT3 RS and FZ1 enter Chicago very early and take a double apex. The Miata hits a deeper first apex and misses the second, which is the better approach for underpowered cars. Then comes Hammerhead, consisting of a painted-in left-right ess-section that opens into a near 180-degree widening right-hander. The Stig almost always exits the ess as fast as possible, driving hard all the way to the outside of the track. For all four vehicles, however, the optimization recommends staying tighter and taking a double apex.

After maintaining as much speed as possible through Follow-Through, Bentley can be taken with two or even four tires off the track. Both the turn geometry and the hit you take at the apex mean that the highest lateral forces will come after clipping that apex as you steer left and try to stay on the course while driving as hard as possible down the back straight and toward Bacharach. Turn-in and braking begin very early there as you sweep in toward the apex. Everyone is pretty much on the same line through Gambon, where it's up to you whether to create a smooth drive onto the front straight for the next lap, or carry way to much speed and run off the track in the hopes of beating the Stig back to the starting line.

The Stig thrashes a Ferrari around Dunsfold

Founder's Notes

Pretty rough lap...

McLaren P1

Founder's Notes

Check out this blog post where I discuss the simulation process for the McLaren P1 and make a prediction for the Stig's lap with the P1.

McLaren P1 Simulation

Founder's Notes

The aforementioned P1 simulation. My official lap time prediction for the Stig is 1'12.3.