F1 Championship leaders
Drivers’ Championship
| # | Grand Prix | Leader | Lead |
|---|---|---|---|
| 1 | Brazil | (FRA) Alain Prost | 3 |
| 2 | South Africa | (FRA) Alain Prost | 6 |
| 3 | Belgium | (FRA) Alain Prost | 5 |
| 4 | San Marino | (FRA) Alain Prost | 11 |
| 5 | France | (FRA) Alain Prost | 6 |
| 6 | Monaco | (FRA) Alain Prost | 10.5 |
| 7 | Canada | (FRA) Alain Prost | 8.5 |
| 8 | Detroit | (FRA) Alain Prost | 11.5 |
| 9 | Dallas | (FRA) Alain Prost | 9.5 |
| 10 | Britain | (FRA) Alain Prost | 2.5 |
| 11 | Germany | (FRA) Alain Prost | 5.5 |
| 12 | Austria | (AUT) Niki Lauda | 3.5 |
| 13 | Netherlands | (AUT) Niki Lauda | 0.5 |
| 14 | Italy | (AUT) Niki Lauda | 9.5 |
| 15 | Europe | (AUT) Niki Lauda | 3.5 |
| 16 | Portugal | (AUT) Niki Lauda | 0.5 |
- First time as championship leader
- No driver led the championship for the first time in 1984
- Last time as championship leader
- Niki Lauda
Constructors’ Championship
| # | Grand Prix | Leader | Lead |
|---|---|---|---|
| 1 | Brazil | McLaren-TAG | 3 |
| 2 | South Africa | McLaren-TAG | 18 |
| 3 | Belgium | McLaren-TAG | 11 |
| 4 | San Marino | McLaren-TAG | 14 |
| 5 | France | McLaren-TAG | 20 |
| 6 | Monaco | McLaren-TAG | 22 |
| 7 | Canada | McLaren-TAG | 30 |
| 8 | Detroit | McLaren-TAG | 32.5 |
| 9 | Dallas | McLaren-TAG | 27 |
| 10 | Britain | McLaren-TAG | 33 |
| 11 | Germany | McLaren-TAG | 45.5 |
| 12 | Austria | McLaren-TAG | 52 |
| 13 | Netherlands | McLaren-TAG | 62.5 |
| 14 | Italy | McLaren-TAG | 70 |
| 15 | Europe | McLaren-TAG | 74 |
| 16 | Portugal | McLaren-TAG | 86 |
Notes
- The 1984 season was the eighth season, and the first since 1981, in which the Constructors’ Championship was led from start to finish by the same constructor.
- McLaren was the sixth constructor to achieve this feat.
- First time as championship leader
- No constructor led the championship for the first time in 1984
- Last time as championship leader
- No constructor led the championship for the last time in 1984