The first World Championship race of the new 3-litre engine formula was held in Monaco. Few teams were ready for the new regulations with several teams starting the race with 1965 engines still in place, or had adapted heavier sports car racing engines to suit.

Some sessions were filmed for the movie Grand Prix. It was the debut race of the McLaren racing team, and the Repco V8 in the back of Brabham's new 1966 BT19 chassis. The British-licensed as well as based and New Zealand-owned McLaren team debuted not in British racing green nor in New Zealand's traditional racing colours of green, black and silver, but instead in white and green in order for Grand Prix director John Frankenheimer to be able to use the McLaren as a double for the fictional Yamura cars in the film.^[1] John Surtees, though still recovering from a crash at Mosport Park, led for 14 laps from Jackie Stewart, Jochen Rindt and Denny Hulme until his differential broke, handing the lead to Stewart. Hulme retired whilst Graham Hill and Jim Clark disputed third place before Clark's suspension gave out. Meanwhile, Lorenzo Bandini was smashing the lap record before having to ease off to prevent the front brakes wearing out. Stewart won from Bandini with Graham Hill third and Bob Bondurant fourth the only other car past the line in a race of extreme attrition. New rules meant that cars had to complete 90% of the race distance to be classified and eligible for points, meaning that whilst Guy Ligier and Jo Bonnier were still racing, they were considered far enough behind to have actually retired. To this day, this race holds the record for having the fewest classified finishers in a single race in Formula One history.

Qualifying edit

Race edit

• Notes: Only the top five positions are included for both sets of standings.