The 1978 Italian Grand Prix clinched Mario Andretti's Formula One World Championship and saw the fatal accident of Ronnie Peterson.
Key Facts
- Race date
- 10 September 1978
- Official winner
- Niki Lauda (Brabham-Alfa Romeo)
- Original finisher (penalised)
- Mario Andretti (Lotus-Ford)
- Andretti's championship margin
- 12 points over Peterson before race
- Last Alfa Romeo-powered win
- As of 2025, this remains the last such victory
- Lotus Constructors' titles
- 7th and final Constructors' title for Lotus
By the Numbers
Location
Cause → Event → Consequence
Mario Andretti entered the race leading the Drivers' Championship by 12 points over teammate Ronnie Peterson, with three races remaining and Lotus holding a commanding lead in the Constructors' standings. The race at Monza was set to be a potentially title-deciding event for Andretti.
At the start, a multi-car accident injured Ronnie Peterson fatally. Andretti and Villeneuve crossed the line first and second but were penalised one minute each for jumping the start, elevating Niki Lauda to the race win. Andretti, having clinched the championship, dropped his appeal upon learning of Peterson's death.
Andretti became Formula One World Champion—the last American to hold the title. Lotus secured their seventh and final Constructors' Championship. Peterson died from his injuries, casting a shadow over the title celebration. The race also stands as the last victory for an Alfa Romeo-powered car as of 2025.