{"id":41057,"date":"2025-09-04T10:50:03","date_gmt":"2025-09-04T08:50:03","guid":{"rendered":"https:\/\/www.italpassion.fr\/?p=41057"},"modified":"2025-09-04T12:20:26","modified_gmt":"2025-09-04T10:20:26","slug":"this-alfa-romeo-75-is-powered-by-the-worlds-most-powerful-500hp-v6-busso-at-9000rpm","status":"publish","type":"post","link":"https:\/\/www.italpassion.fr\/en\/alfa-romeo\/cette-alfa-romeo-75-embarque-un-v6-busso-de-500-ch-a-9000-tr-min-le-plus-puissant-du-monde\/","title":{"rendered":"This tuner created the Alfa Romeo 75 with Busso (+500 hp) and Bialbero (+360 hp)... the most powerful in the world?"},"content":{"rendered":"<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-500.jpg\" alt=\"\" class=\"wp-image-41062\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-500.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-500-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-500-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-500-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p>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.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Alfa Romeo 75 with V6 Busso!<\/h2>\n\n\n\n<p>Produced from 1979 to 2005, the Busso V6 from<a href=\"https:\/\/www.italpassion.fr\/en\/alfa-romeo\/\">Alfa Romeo<\/a> remains one of the great marvels of automotive engineering, the \"Alfa violin\" as it was nicknamed for its splendid vocalizations.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-1.jpg\" alt=\"\" class=\"wp-image-41068\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-1.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-1-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-1-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p>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.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-4.jpg\" alt=\"\" class=\"wp-image-41069\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-4.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-4-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-4-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-4-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Alfa 75 3.9 24V Engine 2020\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/-drBoHs8OG8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>The result of this transformation? <strong>500 hp and an engine speed that climbs to 9,000 rpm, for just 975 kilos!<\/strong> 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\"!<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Alfa Romeo 75 V6 Busso 4.0L OKTECH - PURE SOUND &amp; ACTION\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/E2oTthSzvpE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">The new Oktech project: an Alfa Romeo 75 IMSA with Bialbero engine!<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-001.jpg\" alt=\"\" class=\"wp-image-41063\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-001.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-001-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-001-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-001-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-okech-00.jpg\" alt=\"\" class=\"wp-image-41061\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-okech-00.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-okech-00-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-okech-00-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-okech-00-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"1200\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-900x1200.jpg\" alt=\"\" class=\"wp-image-41059\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-scaled.jpg 900w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-315x420.jpg 315w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-768x1024.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-9x12.jpg 9w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-romeo-75-busso.jpg\" alt=\"\" class=\"wp-image-41058\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-romeo-75-busso.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-romeo-75-busso-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-romeo-75-busso-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-romeo-75-busso-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-imsa-oktech.jpg\" alt=\"\" class=\"wp-image-41066\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-imsa-oktech.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-imsa-oktech-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-imsa-oktech-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-imsa-oktech-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p>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!<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech.jpg\" alt=\"\" class=\"wp-image-41060\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-oktech.jpg\" alt=\"\" class=\"wp-image-41064\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-oktech.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-oktech-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-oktech-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-busso-oktech-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-arreiere.jpg\" alt=\"\" class=\"wp-image-41065\" srcset=\"https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-arreiere.jpg 1200w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-arreiere-420x280.jpg 420w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-arreiere-768x512.jpg 768w, https:\/\/www.italpassion.fr\/wp-content\/uploads\/2025\/09\/alfa-75-oktech-arreiere-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p>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!<\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":8,"featured_media":41062,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"categories":[22],"tags":[511,570],"class_list":["post-41057","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-alfa-romeo","tag-alfa-romeo-75","tag-oktech","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ce pr\u00e9parateur a cr\u00e9\u00e9 les Alfa Romeo 75 avec Busso (+500 ch) et Bialbero (+360 ch)... les plus puissantes du monde ? - ItalPassion<\/title>\n<meta name=\"description\" content=\"Alfa Romeo a marqu\u00e9 l\u2019histoire avec ses moteurs l\u00e9gendaires et ses berlines de caract\u00e8re, mais certains passionn\u00e9s repoussent encore les limites\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.italpassion.fr\/en\/alfa-romeo\/this-alfa-romeo-75-is-powered-by-the-worlds-most-powerful-500hp-v6-busso-at-9000rpm\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ce pr\u00e9parateur a cr\u00e9\u00e9 les Alfa Romeo 75 avec Busso (+500 ch) et Bialbero (+360 ch)... les plus puissantes du monde ? 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