The 1976 Six Hours of Mugello was the opening round of the 1976 World Championship for Makes. It took place at the Mugello Circuit, Italy on 21 March 1976. It was the first race with the participation of the new "Group 5" cars, also known as "Silhouettes".

Official results Class winners in bold. Cars failing to complete 75% of the winner's distance marked as Not Classified (NC). Pos Class No Team Drivers Chassis Laps Engine 1 Group 5 4 Martini Racing-Porsche Jochen MassJacky Ickx Porsche 935 174 Porsche Type 935 Turbo Flat-6 2,8L 2 Group 5 5 Kremer Racing Bob WollekHans Heyer Porsche 935 168 Porsche Type 935 Turbo Flat-6 2,8L 3 Group 4 7 Egon Evertz Leo KinnunenEgon Evertz Porsche 934 162 Porsche Type 911 Turbo Flat-6 3,0L 4 Group 5 23 Joest Racing Reinhold JoestJürgen BarthWilhelm Bartels Porsche 911 RSR 161 Porsche Type 911 Turbo Flat-6 3,0L 5 Group 5 22 Kenneth Leim Kenneth LeimKurt Simonsen Porsche 911 RSR 157 Porsche Type 911 Turbo Flat-6 3,0L 6 Group 4 18 Georg Loos Rolf StommelenTim Schenken Porsche 934 155 Porsche Type 911 Turbo Flat-6 3,0L 7 Group 4 9 Brescia Corse Girolamo CapraAngelino LepriGabriele Gottifredi Porsche 934 154 Porsche Type 911 Turbo Flat-6 3,0L 8 Group 5 2 Hermetite BMW John FitzpatrickTom Walkinshaw BMW 3.0CSL 151 BMW S6 3,5 L 9 Group 5 34 Jolly Club Walter DonàGiovanni LiseMartino Finotto Ford Escort 148 Ford BDG S4 2,0L 10 Group 5 3 Alpina Harald GrohsSam Posey BMW 3.0CSL 147 BMW S6 3,5 L 11 Group 5 33 Ciro Nappi Ciro NappiRiccardo Ricci BMW 2002 144 BMW M10 S4 2,0L 12 Group 5 31 Giada Auto Ferruccio CalicetiCarlo Brunner Alpine Renault 139 Renault-Gordini S4 1,6L DNF Group 5 1 Schnitzer Motorsport Brian RedmanDieter QuesterAlbrecht Krebs BMW 3.0CSL 169 BMW S6 3,5 L NC Group 5 37 Città dei Mille Duilio GhislottiRomeo Camathias Alfa Romeo GTV 118 Alfa Romeo S4 2,0L DNF Group 5 3 Mario Ruoso Mario RuosoPaolo de Leonibus Ford Escort 86 Ford BDG S4 2,0L DNF Group 4 24 Jolly Club Emilio PaleariCarlo FacettiRiccardo Ricci lancia Stratos 81 Ferrari V6 2,4 Turbo DNF Group 5 42 Scuderia Vesuvio Carlo GiorgioCosimo Turizio Ford Escort 62 Ford BDG S4 2,0L DNF Group 4 19 Georg Loos Toine HezemansClemens Schickentanz Porsche 930 60 Porsche Type 911 Turbo Flat-6 3,0L DNF Group 3 16 Zip-Up Racing Reine WisellArturo MerzarioStuart Graham Chevrolet Camaro Z 52 Chevrolet V8 5,7l DNF Group 3 15 Zip-Up Racing Stuart GrahamReine WisellToblasson Chevrolet Camaro Z 52 Chevrolet V8 5,7l DNF Group 5 32 Jolly Club Martino FinottoUmberto GranoRenzo Zorzi Ford Escort 33 Ford BDG S4 2,0L DNF Group 5 38 Piercarlo Ghinzani Piercarlo GhinzaniGiovannI Cùarminati Porsche 914 32 Porsche S4 1,8L DNF Group 4 14 Jolly Club Giorgio SchonGiuseppe BiancoGiorgio Gargano Porsche 930 7 Porsche Type 911 Turbo Flat-6 3,0L DNF Group 5 25 Michele di Gioia Lella LombardiMichele di GioiaGiorgio Gargano Porsche 911 RSR 5 Porsche Type 911 Turbo Flat-6 3,0L DNS Group 5 21 Lancia Carlo FacettiVittorio Brambilla lancia Stratos 0 Ferrari V6 2,4 Turbo