The Citroën AX Turbo That Could Have Changed Hot-Hatches

The story of the Citroën AX Turbo is the kind that makes you sigh over a “what if…”. Had it reached production, it might have transformed the compact hot-hatch scene during the 1990s, leaving the Volkswagen Polo G40, Fiat Uno Turbo i.e. and their rivals behind. France simply lacked the nerve.

The project was developed by Danielson Engineering, a French tuning specialist with such close PSA ties that it was once dubbed the “French AMG”.

Citroën AX Turbo: Danielson’s wild engineering project

Under Joseph Le Bris’s direction, the Citroën AX GTI gained a Garrett T025, an air-to-air intercooler and several engineering modifications that turned it into a properly ferocious little machine. We tell the full story in this video:

The figures speak for themselves: 173 bhp from just 800 kg. It was quicker over the first 1,000 metres than a BMW M3 E30, while snapping at the heels of cars such as the Lancia Delta Integrale. Period tests left everyone astonished by this pocket rocket.

A turbo boost button in place of the radio

Danielson knew, however, that the car would be too unruly for everyday use. Its answer was clever: replacing the radio was a magic button that adjusted turbo pressure. At 0.55 bar, output stood at 137 bhp. Turn it up to 1 bar and it unleashed the full 173 bhp.

Although it had the ideal Group N formula - light, competitive and relatively affordable - Citroën backed away. The regulations required 2500 homologation cars, and the manufacturer judged the investment too risky. The outcome? Just two examples were built, leaving the AX Turbo with unicorn status in the automotive world - so rare that some people question whether it ever existed.

It is one of those cars that could have rewritten the history of French hot-hatches. The AX Turbo had everything needed to humiliate its competitors, but it fell victim to Citroën’s lack of boldness. In 2026, I want to drive one. Let’s see whether we can make it happen…