BTCC runs S2000 rules:
FIA specifications include the following:[9] [10]
• Derived from production model, of which at least 2500 have been produced in the past year
• Maximum of 2 liter (2000 cc) displacement
• Normal Aspiration, Rally: 8500 rpm maximum, Circuit: 8500 rpm maximum for 4 cylinders, 8750 rpm maximum for 5 cylinders, 9000 rpm maximum for 6 cylinders.
• All wheel drive is permitted in rally cars, but not in touring cars.
• 6-speed sequential gearbox (Control specification), or 5-speed MT gearbox retaining original gear ratios.
• Front and rear McPherson suspension
• No electronic driver aids
• Must be for sale at a maximum price of €168,000
So how on earth are teams allowed to use a turbocharger? Seems a bit fucked up. Oh well.
Anyway, yeah, none of the cars in there would be running anything close to stock engines… at least internally. They have rules to follow and will push the limits of engineering and budgets to get the maximum amount of power delivery and handling. So none of the BTCC cars are even remotely comparative to their road-going brothers.
So as to why the BTCC DC5 isn‘t doing as well as say a DC5 vs a Focus ST in ‘the real world‘ would be down to drivers and engineering based on the teams respective budgets/sponsorship/backing.
It‘s a shame what‘s happened in the WRC – only really a couple of French cars racing competitively and the loss of Subaru, Mitsu etc has made it pretty unappealing IMO although I do still enjoy watching it. I heard WRC is going down the S2000 route to attract more teams – the current rules make it hard for teams/manufacturers to take part ‘cos it‘s too god damn expensive.
Oh how I miss the days of seeing the STi and Evo 6 battling it out. It‘s just not the same as seeing a Peugeot and Citroen doing the same thing….