Project Motor Racing has received its Version 2.3 update, bringing a new road car to the simulator alongside a new vehicle class, physics revisions, visual improvements and a series of changes to ModHub and Career Mode.
The update continues Straight4 Studios’ efforts to refine the title based on community feedback, with changes covering everything from vehicle handling and AI behaviour to multiplayer, replays and console functionality.
The main addition in Version 2.3 is the Lamborghini Temerario, which has been added to the base game alongside the new Track Day class.
The Temerario is powered by a 4.0-litre twin-turbocharged V8 producing 789 horsepower, with three electric motors bringing combined output to around 907 horsepower. The hybrid powertrain is accompanied by all-wheel drive and a 10,000 RPM redline.
Project Motor Racing also simulates the Lamborghini’s four-wheel-steering system. At speeds below 75 km/h, the rear wheels can turn by up to three degrees in the opposite direction to the front wheels. This effectively shortens the car’s turning radius and is designed to help the Temerario rotate through slower corners.
The addition also establishes Track Day as a new class within the base game, potentially leaving room for further road-going performance cars to join the category in future.
Version 2.3 includes a substantial round of physics adjustments across several racing classes.
For GT3 and GT4 cars, tyre behaviour has been refined, particularly around grip when the tyres are cold and the transition towards the limit. Directionality and aerodynamics have also been adjusted, alongside changes to pitch sensitivity and stability during high-speed cornering, braking and lifting. GT4 additionally receives a fix for a tyre-wear overflow issue and updated differential flex.
The LMDh class receives its own set of revisions. These include changes to tyre heat generation, sensitivity under load and compound separation. Aerodynamic behaviour has also been adjusted around ride height, pitch and yaw, while brake-duct behaviour now has a revised relationship with aerodynamic drag and tyre temperatures. Stability under braking and during corner rotation has been improved as well.
Several individual cars have also received updates. The Aston Martin Valkyrie Hypercar gets revised default toe settings, while the Ford Mustang GT3 and GT4 receive updated Balance of Performance changes. The Porsche 718 Cayman GT4 Clubsport and Porsche 911 GT3 R also receive setup and performance revisions.
Visual changes form another significant part of the update.
Straight4 has introduced a new physically based tone-mapping system intended to produce more consistent lighting and colour reproduction across different conditions. The system is designed to retain more detail in bright skies, reflections, shadows and other high-contrast areas while reducing colour distortion and clipping.
Weather and time-of-day transitions have also been revised. The game now uses a more realistic sun-brightness curve throughout the day, with smoother transitions between sunrise, daylight and sunset. Night-time ambient lighting has been increased to improve visibility, while scene colour temperature dynamically responds to the prevailing sky illumination.
Long grass rendering has also been improved, particularly on sloped terrain and in areas affected by shadows.
The ModHub has received several quality-of-life improvements.
Previously, players joining a custom multiplayer lobby with missing mods needed to locate and install those modifications themselves. Version 2.3 now identifies the required missing content when joining a custom lobby and offers it for installation through ModHub.
A search function has also been added, while installed, update and download counts provide clearer information about the status of individual mods.
Career Mode now supports multi-class championships as well, allowing events to feature multiple vehicle classes. Several additional Career Mode issues have been addressed, including problems with vehicle purchasing, repair costs and championship progression.
The update also makes changes to the game’s AI. The Nürburgring 24 Hours pit lane and pit-exit behaviour have been adjusted to reduce sudden AI movements and spins. GT3 AI performance has been recalibrated to account for the latest player-car changes, while top speeds for mid- and rear-engined GT3 cars have been corrected.
LMDh AI balance has also been revised, with the Acura receiving an increase in pace and the Aston Martin Valkyrie being reduced accordingly.
Online functionality receives several fixes, including an issue that could prevent Factory Driver fastest laps from being recorded. Problems during vehicle changes, qualifying-to-race transitions and cars moving on the grid before the start have also been addressed.
One of the more notable additions for console players is UDP telemetry.
Version 2.3 enables UDP telemetry settings on PlayStation 5 and Xbox Series X|S, allowing telemetry data to be sent to compatible external applications and devices over a network. This can be used for additional driving information and potentially external displays, depending on the hardware and software being used.
The update also adds average fuel-per-lap information to supported MoTeC displays and makes several changes to tyre-temperature and brake-temperature information shown through the HUD.
Version 2.3 goes considerably further than simply adding another car. The Lamborghini Temerario and Track Day class are the headline additions, but the update also targets the underlying handling model, lighting, weather, AI, ModHub, Career Mode and online functionality.
For players already using mods or multiplayer, the ModHub changes should reduce some of the friction around custom content, while the revised physics and rendering systems address areas that affect the core driving experience. Console users also gain access to UDP telemetry, bringing another tool for those looking to integrate Project Motor Racing into a more advanced sim racing setup.
Version 2.3 is a broad update for Project Motor Racing, with the Lamborghini Temerario providing a new addition while the physics, visuals, ModHub and multiplayer systems all receive useful improvements. The update addresses several areas that should make the overall experience more consistent and easier to use.
