Crossposting my previous recommendation of this game for Ross to review on RGD. I L-O-V-E this game!!
QuoteHi Ross! I'd like to recommend Mobil 1 Rally Championship. If you sucessfully activated your powers of deduction, you'll find this is a racing game, featuring immense rally stages. It was the last game developed by Magnetic Fields, and released in 1999. The main attraction of the game are the super-long stages, created using real-life data from maps from the Ordnance Survey, a mapping agency for Britain and Ireland. They feel like a journey.
Looking back on it, the physics are nothing special, with sound design being quite poor in fact, however it's a game I thought you'd like due to the sheer immensity of the setting. IIRC there's a stage lasting for over 30 minutes (racing pace), with most of them averaging 10 minutes I'd say. IMO it was the best rally game until Richard Burns Rally released in 2004.
EDIT: I took screenshots of all the stage description screens in the game: https://imgur.com/a/h1bRD8a
Adding up, the game has 652km across all its stages, and 18km averaged on its 36 stages! For 1999, this was a proper achievement. It still is! And they received great reviews too, mostly nines across the board.
EDIT: I've recently replayed the game, so I'm gonna leave a few tips here:
https://www.pcgamingwiki.com/wiki/Mobil_1_Rally_Championship is a great source of info;
The games runs well on Windows 10, however the audio may glitch with multicore CPUs. Set affinity to one core only, via the Task Manager (Details -> Ral.exe -> Set affinity);
Widescreen resolutions are not supported, but they may be hacked with hex editors;
The game has three single-player modes: single race, championship and arcade. In single race you choose a car and stage, and race there; championship mode takes you through all the stages and all the rallies, where you compete against the AI's simulated time, and avoid crashing out of the rallies; and arcade mode is championship mode simplified, you race against the AI (this time they're physically there) whilst starting in last place.
Championship mode is the game's main mode. You choose a car and class and compete amongst them through the 6 rallies, with 6 stages each. Damage is on, so crashing or driving roughly will worsen your car's performance, and put you at risk of retiring from the rally. You may only fix, modify your car's setup, and save the game on the service areas, which are spaced out differently on each rally. Points are awarded at the end of the rally, to determine the season's champion.
The game is officially licensed for the A7, A6 and A5 classes of the British Rally Championship, but a fictional A8 class based on WRC cars is also available after you win the championship mode. Afterwards you may replay the championship mode with the A8 class, however, it's much tougher! The cars are really fast, and critically, in this mode only, after the end of a rally your damage ISN'T fixed, thus making reliability an absolute freakin' nightmare. Make sure to keep several different saves for this mode, and good luck!