How to compare ACC laps with replay telemetry
A faster lap is a useful reference when you can see where the difference begins. ACCReplay lets you compare Assetto Corsa Competizione laps using telemetry derived from saved replay files.
Choose a useful reference lap
Start with the same circuit and car model. The ACC leaderboards show each driver's fastest lap in each car model. Try Monza, Spa-Francorchamps or Nürburgring, or choose your next practice circuit.
Regulated leaderboards filter for 23°C air and 28°C track temperatures. Use Latest major patch to focus on laps recorded since the start of the latest major/minor ACC version line. Matching these filters makes comparisons more useful, but does not guarantee identical setups, fuel loads or driving conditions. Treat a lap-time gap as context rather than a precise measure of driving skill.
Open the two-lap comparison
- Open a track leaderboard, or open a replay from Replays.
- Select the compare button beside each of two laps.
- Choose Compare in the selection panel at the bottom to open their telemetry in a new tab.
Remove either selected lap to try a different reference. Comparing two of your own laps can also help you understand what changed between attempts.
Read one corner at a time
Begin with the speed trace and identify a corner where the laps differ. Then check braking, throttle and gear selection around that same section.
- Braking: compare when braking starts and how the brake is released. A later braking point alone does not explain a faster corner.
- Minimum speed: look at the speed through the corner, then follow the trace into the exit. More entry speed may come with a slower exit.
- Throttle and gears: compare when acceleration resumes and where shifts happen. Consider the following straight as well as the corner itself.
Choose one difference to investigate in your next practice run, then compare again. Telemetry shows differences between laps; it does not establish their cause on its own.
Bring your own ACC replay
Save a .rpy replay in ACC, then upload it using Add new on the Replays page. File transfer and replay processing are separate stages. Once processing is complete, open the replay to explore its laps.
For file locations, recording quality and missing laps, see replay recording help. Higher replay quality records more data and produces larger files.