Known as the Renault 5 Maxi Production it is a car that was entered into the French Super Production (Championnat de France de Superproduction) series, apparently only 3 were built in this spec. It first raced in 1986, I can't find any results info for it... most of the info about it seems to be on French language sites, is anyone with better linguistics skills than me able to find info??
The specs for the 1987 model would appear to be : Engine: Renault four-cylinder in-line unit - Capacity 1397cc - Bore 76mm - Stroke 77mm - Garrett T4/T3 turbocharger Nominal power: 380bhp at 7500rpm - Torque 43mkg at 5000rpm Gearbox: Five forward gears and reverse - Two-disc clutch Brakes: Ventilated discs front an rear - Four-piston calliper - Forced cooling - Adjustable pedal - Two master cylinders, front and rear - Adjustable limiter with hand lever and hydraulic control Coachwork: Single shell in reinforced steel Dimensions: 3.66m long by 1.85m wide by 1.33m high Weight: 1080kg Top speed: 190 to 274kph depending on gearbox ratio
Engine: Renault four-cylinder in-line unit - Capacity 1397cc - Bore 76mm - Stroke 77mm - Garrett T4/T3 turbocharger Nominal power: 380bhp at 7500rpm - Torque 43mkg at 5000rpm
380 bhp out of a 1400?! That's mental!!!
It's not that mental - it's only slightly more than the 350bhp the Renault 5 Maxi Turbo was running in Group B rallying at the time, and this car was the circuit racing version of it. For racing the engine wouldn't have needed to have lasted as long so they would have been able to turn the boost up a bit.
For truly mental bhp/cc figures you need to look at the 80s F1 turbo engines - 900 bhp in race trim and 1300+bhp for qualifying from a 1500cc engine. You could use as much boost as you liked (until the boost limit was introduced in 1987), as long as you could keep the top and bottom ends attached to the block for the length of the race or qualifying session.
The BMW M12 engines were reckoned to be the most powerful of the turbo era in F1, and they were built from 1500cc M10 production blocks, a design dating back to the 1960s. Before they developed heat-cycling processes to simulate it, they preferred to build from used blocks that had done over 50000 miles, as if there were any flaws in the iron casting they would have shown up by then.
you kinda forget what race car engines with turbos on can do, the RS200 had an 1800 in it that made 440bhp stock and I believe the same engine could run around 800bhp if pushed. :S
The 1.8 BDT engine in the RS200 was detuned to 220bhp in 'stock' form. 440bhp was about what the works rally team's engines were producing by the end of 1986 (though there here was very little difference between the stock and rally engines in practice).
In rallycross the 1.8 BDT had a limit of about 650bhp to stay reliable, so almost all the drivers ended up switching over to the 2.1 BDT-E engine, a long-stroke evolution of the BDT design developed by Brian Hart that was intended for the 20 RS200 Evolution homologation models that were abandoned when Group B was banned. It was the BDT-E engine that was capable of the 900+bhp, and drivers like Martin Schanche experimented with different bore/stroke combinations (capacities between 1.9 and 2.4L were tried) to get the optimum balance between outright power and driveability.