IRacing, Only racing content and, also lots of ovals. NASCAR and more ovals are coming.Īssetto Corsa, Lots of licensed exotic and street cars and racing content. RFactor2, Mostly dedicated racing related with the occasional licensed street car. Most people don't play the out of the box content. RFactor1 needs the Realfeel plugin to make it good. IRacing is static, but dynamic track is in the works.īoth rFactor2 and *iRacing get the forces directly from the steering rack without fake effects.Īssetto Corsa's force feedback is made to feel good, but adds exaggerated forces and fake effects. RFactor2 wins here with its Realroad, where the track is dynamically updated with rubber based on car driving lines.Īssetto Corsa has something similar, but doesn't take actual driving lines into account. Only rFactor2 has built-in dynamic rain conditions, but rFactor1 only through plugins. IRacing has full flag and racing rules, rolling and standing starts, safety car and recently added driver swap support.Īssetto Corsa has only standing starts, but no false starts (you can only engage gear when the lights go out) and rudimentary flag rules, but no pit-stops for AI. RFactor2 has full flag rules & racing rules, has rolling, standing and false starts, safety car and has driver swap support both online and offline and a resume from replay feature. RFactor1 has almost full flag rules & racing rules (but lacks some some oval rules) has rolling, standing and false starts, safety car and offline driver swap support, not sure about online. IRacing has vertex deformation, and some parts flying off, (no wheels), also looks questionable on open wheelers. RFactor2 has similar capabilities, but removed vertex deformation because they are working on a new constraint system for more realistic damage.Īssetto Corsa damage is, mostly body scratches, loose panels, breaking glass and bent suspension, for now, looks questionable on the open wheel cars Some examples here and here, though the out of the box cars are too strong. RFactor1 has vertex deformation and panels, parts, wheels flying off. RFactor2 has vastly improved AI over rFactor1 and it's probably the best of the modern sims, they can be aggressive, yet disciplined.Īssetto Corsa's AI is still in its infancy and unfortunately too problematic for proper racing and no pit-stops for AI. See also Stock Car Extreme for what the engine is capable of. This is an area that only a handful of sims got right and it took them years to get there. Only iRacing, altough an improved rFactor2 drivetrain/driveline model is in the works and on high priority. No such thing in rFactor1, Assetto Corsa or iRacing. IRacing uses a physical tire model and are making great progress as their results improved a lot over the last few months.Īssetto Corsa uses an empirical tire model with flat spots.īoth rFactor2 and iRacing models chassis flex, which is important for historical and stiff suspension cars, and essential for race trucks and no-suspension karts. RFactor1, uses an empirical model and despite its age can get results within 95% accuracy for the most part and yes you can control a drift in it. Also concepts like slip angle and slip ratio are no longer an input to the model, so issues like low speed accuracy which other models suffer from are history. RFactor2 uses a physical FEM tire model and simulates the entire contact patch in real-time, which also result in very accurate heat transfer, wear and flatspot and tire deformation. Many big name racing sims are derived from this engine, such as the Reiza's Game Stock Car, Truck Sim, Simbin (now called Sector 3) titles GTR2, Race07, DTM and Raceroom Experience etc, Slightly Mad's NFS Shift series and even Project Cars.Īssetto Corsa has a history dating back to the free netKar namie, wich developed into netKar pro. Many teams even use stock rFactor1-2 physics to develop setups and test potential new parts. There is an offshoot product rFactor Pro which is used by most of the real-life F1-grid. RFactor1-2 has a simracing history dating back to Sports Car GT and their F1 and Nascar sims on PC. IRacing is from the former Papyrus, dating back to Indy500 from 1989 and Indycar, Nascar and Grand Prix Legends sims.
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