Alfa Romeo has made history with its legendary engines and characterful sedans, but some enthusiasts are still pushing the limits today. Such is the case of German tuner OKTech, who has tackled the Alfa Romeo 75 to produce two radical versions: one equipped with the legendary Busso V6 pushed to over 500 hp, the other with the 4-cylinder Bialbero developing around 360 hp in an IMSA-inspired configuration. Two extreme interpretations that pay tribute to the cult sedan of the '80s, while propelling it into the ranks of the most powerful Alfa Romeo 75s ever created.
The Alfa Romeo 75 with V6 Busso!
Produced from 1979 to 2005, the Busso V6 fromAlfa Romeo remains one of the great marvels of automotive engineering, the "Alfa violin" as it was nicknamed for its splendid vocalizations.
First released in a 2.5-liter 12-valve carburetor version for the Alfa 6 and then the GTV6, it was then declined during the '80s and early '90s in 2.0-liter, 2.0-liter turbo and 3.0-liter versions, before switching to 24-valve in 1997 on the Alfa 156, with 2.5-, 3.0- and 3.2-liter versions, which was carried on board the Alfa Romeo GT until 2010. In 1985, the Alfa Romeo 75 benefited from the 155hp 2.5-liter V6, then at the end of 1987, with phase 2, switched to the 3.0-liter V6 introduced on the 75 "America", now giving 186hp. The sedan, which celebrates its 40th anniversary this year, enjoys a great deal of love in the Alfista community.
The result of this transformation? 500 hp and an engine speed that climbs to 9,000 rpm, for just 975 kilos! It's enough to make this 75 a catapult and an auditory orgasm! We can't wait to see what's next, as OkTech is currently working on an Alfetta GTV "Freccia d'argento"!
The new Oktech project: an Alfa Romeo 75 IMSA with Bialbero engine!
The new 75 in this article has passed through the hands of German tuner OKTech! This time, the engine is no longer a Busso but a Bialbero, in keeping with the DNA of the Alfa Romeo 75 Evoluzione. As a reminder, the "IMSA" version was a 75 Evoluzione that had been modified to comply with IMSA specifications, which were more permissive than Group A, and which were admitted to the Tour of Italy, which Alfa Romeo won in 1988. It has yet to pass the power bench, but the latest indiscretions speak of 360 hp!
The photos also show that the running gear, underpinnings and chassis have been extensively modernized. Inside, the raw racing atmosphere is guaranteed. The squared-off console and dashboard of the time are still there, but the modernity can be seen in the digital instrumentation screen in the center. The finish is top-notch - you'd think this was one of Autodelta's secret factory models!
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It's great what you're doing I've been an alfist for 49 years I have 3 busso in my garage an alfetta gtv 6 a 75 v6 and a 256 gta sw + 2 159 tbi sedan and sw