Imagine a racing car that is just too quick for anyone to handle. This car is the Lancia Delta S4.
Lancia has been very successful in motorsport over the years, mostly in rallying. Lancia wins three world titles in the '70s with the bizarre purpose-built Stratos. By this time the company's team has already progressed with the development of its successor, the 037. Unfortunately, the joy of winning doesn't last long as everyone expects the next champion to drive an all-wheel-drive car. Welcome to the most ludicrous era of Group B cars where Audi Quattro is the clear favourite. Its most brutal competitor comes from Lancia.
Designed to withstand 1000 hp
The Lancia S4 is a pure racing monster designed to withstand 1000 horsepower. Everyone knows it is impossible to achieve such power even with a four-wheel-drive. According to homologation specification, the 1.8 litre 4-cylinder engine develops only 450 hp.
The Lancia Delta S4 is the first Group B car to eliminate the turbo lag practically. It uses a sequentially spooling Abarth Volumex R18 supercharger (working up to 4500 rpm) and a KKK K27 turbocharger (working above 4500 rpm). Such a setup is capable of handling more than 550 hp, even though testing at 5 bars of boost (2,2 in race trim) shows figures close to 1000 hp. This results in acceleration from 0 to 60 mph in 2.5 seconds.
On top of this, Lancia Delta S4 is among the first rally racing vehicles to utilise a wind tunnel and computer assistance.