Petrolicious Pick: Lancia Delta S4 Group B

28 July, 2016

When a new video drops on the Petrolicious YouTube channel, we’re always excited to see what it’s all about. Recently we wrote an article on the Renault 5 Turbo, and asked the question of whether the Renault 5 Turbo was the ultimate ’80s hot hatch? The response from the readers was a loud one: no, nothing would beat the Lancia Delta. For John Campion, who immigrated to America in June 1984 — with only $26 in his back pocket — the Lancia range of vehicles was his choice of vehicle, too. 

After a few “lucky breaks” as he describes them, John was able to become a successful businessman in America. This meant, for his automotive passion, he was able to collect vehicles from his youth, mainly focusing on rally cars. And because the best rally cars that were ever produced were made in the ’80s, this is where his collection began. 

When you look at the specs of the Lancia Delta S4 Group B, they’re nothing short of phenomenal. The road-going Delta S4 weighed in at 1200kg, whereas the Group B version weighed in at a mere 890kg. This alone would aid in serious performance gains, however Lancia also wanted to work their magic on the engine. By pioneering twin-charge technology, Lancia was able to extract massive horsepower and response from their mid-mounted 1.7-litre engine. As turbochargers in the ’80s were nowhere near as sophisticated as they are now, if you wanted big power, it came at the expense of turbocharger lag.

Utilizing a supercharger with a bypass valve, Lancia was able to have almost instantaneous boost pressure at any rpm. Once the turbocharger was on full boost pressure, the bypass valve would cut the supercharger out of the equation. Official horsepower figures of the Group B version were 480hp, while some sources implied it was closer to 560hp. During testing, the Lancia’s engine managed to handle five bar (72psi) of boost pressure, with 1000hp as a result. 

We recommend turning the volume up for this one, so you can best enjoy the Group B sound! 

The actual Formula One

Seeing, in a shed in Hamilton, New Zealand, the Darracq 120 racer that Louis Wagner, also a pioneer aviator, drove to victory in the 1906 Vanderbilt Cup race felt a little like finding a Rembrandt at a garage sale.
For historical significance, I’d say this car ranks with Ray Harroun’s Marmon Wasp, the first Indianapolis 500 winner. Unlike Harroun’s Wasp, which has been lovingly cared for at the Indianapolis Motor Speedway Hall of Fame Museum over the years, this historically pivotal machine wound up half a world away from its home in France and, to most of the motoring world, largely forgotten. Sadly, so is the story of how the car got to Aotearoa in the first place.
More often than not, a racing car that is a few years old is regarded as obsolete and relegated to a shed somewhere. As far as racing drivers and team owners at the cutting edge of the sport are concerned, the cars are virtually worthless at that point. They can’t be driven on the street; at best they can be reconfigured for lower levels of the sport, so few people care about them until their historical significance becomes more apparent.

Dad will love this!

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