At the end of the 1980s, a young French workshop set out to do to production cars what AMG was doing at Mercedes. Its first target: the Renault 25 V6 Turbo, whose PRV engine it pushed to 240 bhp. A 1989 report from the Turbo show (M6) brings it back to life.
In 1989, the Turbo show on M6 devoted an “exclusive presentation” to a Renault 25 unlike any other: a V6 Turbo reworked by HAS. The archive resurfaced and the association shared it on its YouTube channel — a rare moving image of a car that few enthusiasts have ever seen in the metal.
ANIMATION — A PHOTOGRAPH OF HAS'S RED R25 STORMING SET IN MOTION BY ARTIFICIAL INTELLIGENCE. THE CAR AND THE SETTING ARE GENUINE; ITS ARRIVAL AND DEPARTURE NEVER HAPPENED.
HAS was one of those small independent workshops that flourished at the end of the 1980s: take a well-built production car, rework the engine, the electronics and the chassis, and sell the result as a discreet, better-finished, far quicker alternative to the factory version. The model was AMG at Mercedes — the difference being that HAS worked on a French executive saloon, and outside any manufacturer catalogue.
Its first effort was this Renault 25 V6 Turbo. HAS Prestige is the house brand; the conversion itself carries a name of its own: Storming. Nothing about it was official: no Renault dealer ever ordered one, and the cars were built essentially to order.
The base is the 2,458 cc turbocharged PRV V6 (Z7U) of the Renault 25 V6 Turbo, in its 182 bhp version: the HAS technical sheet gives the same 8.6 compression ratio as Renault's workshop sheet for the Z7U-A702, whereas the 205 bhp version drops to 8.0. HAS draws 240 bhp DIN at 5,700 rpm and 32.5 mkg at 2,700 rpm from it, 58 bhp more.
The price list details the work. The original intercooler is modified and joined by an additional one, with carbon-Kevlar ducting. HAS reworks the electronic control unit and the turbo, and keeps to itself “other very complex modifications that remain confidential”. The gearbox is removed to swap the crown wheel and pinion. Suspension and tyres are declared indispensable: special springs, adjustable dampers, revised front axle settings, corrected ride height, 16-inch Bridgestones.
One point deserves emphasis, because the confusion is common: “HAS” is a tuner, not a factory version. A “Renault 25 V6 Turbo HAS” is a Renault 25 modified by HAS — Renault never sold such a model. The same goes for every name listed in our Tuners section.
The price list of 15 October 1988 sells each item separately. The engine conversion costs 41,500 francs including VAT, the suspension 8,800 francs, the body kit 13,700 francs fitted and painted for a phase 2 car and 12,700 francs for a phase 1. The interior is chosen à la carte: made-to-measure leather in forty colours for the seats and the four doors, 16,500 francs; wood for the dashboard, the console and the four doors, 7,700 francs, with a burr-walnut steering wheel and gear knob as extras.
These documents stayed with the car they belong to, order form included. Dated 16 May 1989, it combines the engine, the suspension, 16-inch Delta Racing wheels, Bridgestone tyres, a black exhaust tip and the body kit, for 84,781.50 francs including VAT.
The brochure also places the business. The workshop is in Pantin, at 17-20 rue Pierre Brossolette, the address of the Airault body shop whose letterhead the price list carries; the registered office is in Paris. In May 1989 its entry in the trade register is still “pending”: HAS was then a brand-new company.
PDF · 6 p.
The brochure for the Storming conversion by HAS, the Pantin workshop: the cover and the centre spread, the technical sheet of the R25 V6 Turbo HAS 240 (1989 model year: 240 bhp DIN at 5,700 rpm, 32.5 mkg at 2,700 rpm, standing 400 m in 15.1 s), the detailed price list of 15 October 1988 and an order form dated 16 May 1989.
With around ten cars built, HAS's Storming has become one of those machines enthusiasts talk about far more often than they meet. The Renault 25 itself — a high-end saloon, a genuine grand tourer, never a sports car — disappeared entirely in 1992, replaced by the Safrane. Which makes each surviving HAS a small piece of PRV heritage.
One of them is in the association's hands: the phase 1 V6 Turbo Storming in the photos above, the very car these documents belong to, presented in detail on the forum by its owner — photos, history and running condition included. The red car in the animation is another one: a phase 1 whose bodywork was restyled to phase 2.
TURBO · M6 · REPORTAGE D'ÉPOQUE — @PRVCONCEPT
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