The 1984 Monaco Grand Prix was a Formula One motor race held at Monaco on 3 June 1984. It was race 6 of 16 in the 1984 FIA Formula One World Championship. It was the only race of the 1984 championship that was run in wet weather.

Alain Prost won the rain-curtailed race from pole position. Ayrton Senna was second in his first podium in Formula One. René Arnoux was later promoted to third after the disqualification of Stefan Bellof.

Practice During practice, Tyrrell's Martin Brundle had a huge crash at the Tabac corner. He landed upside down and was slightly injured, but it was enough to make him a non-qualifier for the race. Brundle later said that he ran back to the pits and had actually gotten into the spare car before team boss Ken Tyrrell got on the radio and asked him if he was OK after the accident. It was then discovered that Brundle could not actually remember how he returned to the pits, so the boss wisely would not allow Brundle to go back onto the track and ordered him out of the car. He then took Brundle to see Formula One medical chief Sid Watkins, who after an examination concluded that the rookie driver was slightly concussed and the decision was made to withdraw him from the race weekend.

Qualifying Alain Prost took his first pole position for McLaren with a time of 1:22.661, just ahead of the Lotus-Renault of Nigel Mansell. Prost's pole was also the first pole for the McLaren MP4/2 as well as for the TAG-Porsche engine. Stefan Bellof was the only non-turbo qualifier in his Tyrrell-Cosworth. Bellof qualified 20th and last while Brundle's crash behind the pits at Tabac saw him as a spectator for the race. Bellof's time edged the Arrows-Ford of Marc Surer by just 0.156. The turbo cars of Eddie Cheever (Alfa Romeo) and Thierry Boutsen (Arrows-BMW) both failed to qualify.

BMW had built specially detuned engines for Brabham to use at Monaco. Instead of the normal engines, the Brabhams only had around to play with, the theory being that full power was not needed at Monaco and the detuned engines would be more drivable. It was also an attempt at better reliability as the team had yet to score a point for the year. Never at ease at Monaco, reigning World Champion Nelson Piquet qualified 9th. With Teo Fabi having commitments to race the US based IndyCars at Milwaukee on the same weekend his brother Corrado Fabi drove the second Brabham, qualifying 15th.

Race The race, held amidst heavy rain, was one of the most contentious in Formula One history, and announced the emergence of at least two new stars. Alain Prost took the first of his four victories at the circuit.

The race start was delayed by 45 minutes due to the heavy rain. With the rain soaking the track, Niki Lauda sought out Bernie Ecclestone on the grid in a bid to have the tunnel flooded as well. The tunnel was dry but coated with oil from the previous days' use (as well as from the historic cars which were on the program that weekend) which Lauda explained had turned it into a fifth gear skid pad when the cars came racing in carrying the spray from their tyres in the morning warmup. Ecclestone used his power as the head of the Formula One Constructors Association to do exactly that, with a local fire truck called in to water down the only dry road on the track.

Pole-sitter Prost led the race from the start, while first corner contact between Ferrari's René Arnoux and the Renault of Derek Warwick pitched Warwick's car into the fence on the outside of St. Devote and into the path of his team-mate Patrick Tambay. Both drivers suffered leg injuries; Warwick bruised his left leg while Tambay broke his leg after his car's suspension punched through the carbon fibre monocoque, causing him to miss the next round in Canada.

Prost was passed on lap nine by Nigel Mansell, to lead a Grand Prix for the first time, when Prost's TAG engine was misfiring and he was delayed by both Corrado Fabi's stalled Brabham and Michele Alboreto's about-to-be-lapped Ferrari just before the tunnel (Prost actually hit a marshal who was pushing Fabi's car away but with no serious injury). Mansell pulled away from Prost at around two seconds per lap, before going off six laps later on the run up to Casino Square after sliding on a painted white line, damaging his car and retiring from the race.

Lauda disposed of Arnoux but Prost assumed the lead again, only to have the Toleman-Hart of Ayrton Senna, who had also passed the Ferrari, quickly closing in. Senna had started thirteenth in the generally uncompetitive Toleman, in the first Formula One street race in his rookie season, and was showing his wet weather skills that would become legendary. On lap 29, Prost waved to the stewards of the race to indicate that he felt the race should be stopped. He was also suffering from a major brake imbalance as his McLaren's carbon brakes were locking due to not generating enough heat in the conditions, the same problem that had caused Lauda to spin at Casino Square on lap 23, whereupon he stalled his engine and was out of the race. A slowing Prost waved again on lap 31 as he passed the start/finish line.

The red flag to stop the race was shown at the end of the 32nd lap after clerk of the course Jacky Ickx decided that conditions were too poor for the race to continue. Senna passed Prost's slowing McLaren before the finish line, but according to the rules, the positions counted are those from the last lap completed by every driver – lap 31, at which point Prost was still leading.Hamilton, Maurice (1984) Autocourse 1984–85 p.141 Hazleton publishing The stoppage was controversial, as it benefited Prost with a Porsche-designed engine, and was made by Ickx, the lead driver with the factory run Rothmans Porsche team in sports car racing. Ickx was suspended from his race control duties for not consulting with the stewards over his decision before making it.

Stefan Bellof, running in the only naturally aspirated car in the race, finished third. Bellof had qualified 20th and last in his Tyrrell 012-Cosworth. His drive from last to third was a stand-out achievement in his short career, although he was later disqualified due to weight restrictions broken by Tyrrell. His drive led to negotiations with Ferrari for a drive for 1986 alongside Michele Alboreto, as René Arnoux was under contract in 1985. The Tyrrell team's results were erased later in the season due to weight infringements, meaning that Bellof was stripped of his podium finish, with his place being taken by René Arnoux. It would prove to be Bellof's only podium visit during his Formula One career.

This was the first time that Ayrton Senna had set a Formula One fastest lap. It was also Toleman's second and final fastest lap in Formula One (Derek Warwick had set the team's only other fastest lap during the 1982 Dutch Grand Prix at Zandvoort).

Classification Qualifying Pos No Driver Constructor Q1 Q2 Gap 1 7 Alain Prost McLaren-TAG1:23.944 1:22.661 2 12 Nigel Mansell Lotus-Renault1:24.927 1:22.752 +0.091 3 28 René Arnoux Ferrari1:24.661 1:22.935 +0.274 4 27 Michele Alboreto Ferrari1:23.581 1:22.937 +0.276 5 16 Derek Warwick Renault1:23.726 1:23.237 +0.576 6 15 Patrick Tambay Renault1:24.828 1:23.414 +0.753 7 26 Andrea de Cesaris Ligier-Renault1:25.939 1:23.578 +0.917 8 8 Niki Lauda McLaren-TAG1:24.508 1:23.886 +1.225 9 1 Nelson Piquet Brabham-BMW1:24.139 1:23.918 +1.257 10 6 Keke Rosberg Williams-Honda1:26.017 1:24.151 +1.490 11 11 Elio de Angelis Lotus-Renault1:25.602 1:24.426 +1.765 12 14 Manfred Winkelhock ATS-BMW1:52.889 1:24.473 +1.812 13 19 Ayrton Senna Toleman-Hart1:27.865 1:25.009 +2.348 14 22 Riccardo Patrese Alfa Romeo1:28.072 1:25.101 +2.440 15 2 Corrado Fabi Brabham-BMW1:31.618 1:25.290 +2.629 16 5 Jacques Laffite Williams-Honda1:27.356 1:25.719 +3.058 17 25 François Hesnault Ligier-Renault1:27.678 1:25.815 +3.154 18 20 Johnny Cecotto Toleman-Hart1:28.241 1:25.872 +3.211 19 24 Piercarlo Ghinzani Osella-Alfa Romeo1:27.723 1:25.877 +3.216 20 4 Stefan Bellof Tyrrell-Ford1:27.834 1:26.117 +3.456 21 17 Marc Surer Arrows-Ford1:27.919 1:26.273 +3.612 22 3 Martin Brundle Tyrrell-Ford1:27.891 1:26.373 +3.712 23 23 Eddie Cheever Alfa Romeo1:28.961 1:26.471 +3.810 24 18 Thierry Boutsen Arrows-BMW1:28.000 1:26.514 +3.853 25 10 Jonathan Palmer RAM-Hart1:29.778 1:27.458 +4.797 26 21 Mauro Baldi Spirit-Hart1:28.360 1:30.146 +5.699 27 9 Philippe Alliot RAM-Hart1:29.637 1:29.576 +6.915

*Positions with a pink background indicate drivers that failed to qualify

Race Pos No Driver Constructor Tyre Laps Time/Retired Grid Points 1 7 Alain Prost McLaren-TAG 31 1:01:07.740 1 4.5 2 19 Ayrton Senna Toleman-Hart 31 + 7.446 13 3 3 28 René Arnoux Ferrari 31 + 29.077 3 2 4 6 Keke Rosberg Williams-Honda 31 + 35.246 10 1.5 5 11 Elio de Angelis Lotus-Renault 31 + 44.439 11 1 6 27 Michele Alboreto Ferrari 30 + 1 Lap 4 0.5 7 24 Piercarlo Ghinzani Osella-Alfa Romeo 30 + 1 Lap 19   8 5 Jacques Laffite Williams-Honda 30 + 1 Lap 16   4 Stefan Bellof Tyrrell-Ford 31 Underweight car (+21.141) 20   22 Riccardo Patrese Alfa Romeo 24 Steering 14   8 Niki Lauda McLaren-TAG 23 Spun Off 8   14 Manfred Winkelhock ATS-BMW 22 Spun Off 12   12 Nigel Mansell Lotus-Renault 15 Spun Off 2   1 Nelson Piquet Brabham-BMW 14 Electrical 9   25 François Hesnault Ligier-Renault 12 Electrical 17   2 Corrado Fabi Brabham-BMW 9 Electrical 15   20 Johnny Cecotto Toleman-Hart 1 Spun Off 18   16 Derek Warwick Renault 0 Collision 5   15 Patrick Tambay Renault 0 Collision 6   26 Andrea de Cesaris Ligier-Renault 0 Accident 7   17 Marc Surer Arrows-Ford     3 Martin Brundle Tyrrell-Ford     23 Eddie Cheever Alfa Romeo     18 Thierry Boutsen Arrows-BMW     10 Jonathan Palmer RAM-Hart     21 Mauro Baldi Spirit-Hart     9 Philippe Alliot RAM-Hart         Stefan Bellof originally finished 3rd in his Tyrrell but was later disqualified due to weight restrictions broken by Tyrrell.

Championship standings after the race

Drivers' Championship standings Pos Driver Points 1 Alain Prost 28.5 2 Niki Lauda 18 3 René Arnoux 14.5 4 Derek Warwick 13 5 Elio de Angelis 12.5Source:

Constructors' Championship standings Pos Constructor Points 1 McLaren-TAG 46.5 2 Ferrari 23.5 3 Renault 20 4 Lotus-Renault 16.5 5 Williams-Honda 11Source:

References