| Type: | GP |
| Description: | Non-championship Formula Two race |
| Country: | Singapore |
| Grand Prix: | Singapore |
| Date: | 22 April |
| Year: | 1973 |
| Official Name: | VIII International Singapore Grand Prix[1] |
| Location: | Old Upper Thomson Road, Singapore |
| Course: | Thomson Road Grand Prix circuit |
| Course Mi: | 3.023 |
| Course Km: | 4.865 |
| Distance Laps: | 50 |
| Distance Mi: | 151.149 |
| Distance Km: | 243.250 |
| Pole Driver: | Graeme Lawrence |
| Pole Country: | New Zealand |
| Pole Team: | Surtees-Hart |
| Pole Time: | 1:57.1 |
| Fast Driver: | Leo Geoghegan |
| Fast Team: | Birrana-Hart |
| Fast Time: | 1:54.9 |
| Fast Country: | Australia |
| First Driver: | Vern Schuppan |
| First Country: | Australia |
| First Team: | March-Hart |
| Second Driver: | Graeme Lawrence |
| Second Country: | New Zealand |
| Second Team: | Surtees-Hart |
| Third Driver: | John MacDonald |
| Third Country: | Hong Kong |
| Third Team: | Brabham-Ford |
| Third Flag Suffix: | 1959 |
The 1973 Singapore Grand Prix was a motor race held at the Thomson Road Grand Prix circuit on 22 April 1973. It was the final Singapore Grand Prix before the cancellation of the event, which resumed in 2008 as a round of the Formula One World Championship. The race was contested over 50 laps and was won by Vern Schuppan driving a March. The race was run to Australian Formula Two rules.[2]
John MacDonald had a brand new Brabham BT40 delivered to him for the race. However, his team ran into difficulty due to fuel pick-up problems with the new car.[3]
In the 1972 event, the 28-year-old Singaporean driver Lionel Chan was involved in an accident which saw his car roll into a ditch on the fourth lap after losing a wheel and hitting an official car. He was taken to hospital but fell into a coma and later died.[4] [5] The circuit was considered dangerous and the Singaporean Minister of Social Affairs, Encik Othman Wok, stated, "I'll be the happiest man when we get a permanent circuit."[6]
Schuppan was leading Malcolm Ramsay's Birrana when Schuppan's March kicked up some stones, puncturing Ramsay's fuel tank and covering him in petrol.
During a support race for touring cars, Swiss driver Joe Huber went off the track into a lamp post. He died six days later as a result of his injuries.[7] The difficulty of implementing adequate safety measures, along with concerns that the Grand Prix was promoting reckless driving, led to motor racing being banned in Singapore after the 1973 Grand Prix.[8] Other contributory factors have been suggested, including an increase in traffic, the inconvenience of having to close roads for the event and also a surge of oil prices stemming from the Suez Crisis.[9] On average the Grand Prix saw one fatality per year, partly due to the nature of the circuit which featured monsoon drains and bus stops. Graeme Lawrence, a three-time winner of the Singapore Grand Prix, believed that the Thomson Road circuit was one of the most dangerous in the world.
A permanent track incorporating a sports complex was proposed as a replacement for the Thomson Road circuit, but this did not come to fruition.
| Pos | Name | Chassis | Engine | Time | |
|---|---|---|---|---|---|
| 1 |  Graeme Lawrence | Surtees TS15 | Hart | 1:57.1 | |
| 2 |  Vern Schuppan | March 722 | Hart | 1:57.3 | |
| 3 | Leo Geoghegan | Birrana 273 | Hart | 1:57.8 | |
| 4 | Ken Smith | March 722 | Hart | 1:59.1 | |
| 5 |  John MacDonald | Brabham BT40 | Hart | 1:59.1 | |
| 6 | Malcolm Ramsay | Birrana 273 | Hart | 1:59.5 | |
| 7 | Max Stewart | Rennmax BN3 | England | 2:01.3 | |
| 8 | Tony Stewart | Dolphin 732 | England | 2:01.5 | |
| 9 |  Sonny Rajah | March 722 | Hart | 2:02.6 | |
| 10 | Albert Poon | Brabham BT40 | Hart | 2:03.0 | |
| 11 |  Mike Hall | Brabham BT40 | Hart | 2:04.0 | |
| 12 | Percy Chan | Lotus 69 | RES | 2:07.5 | |
| 13 |  Jan Bussell | Palliser WDB4 | BRM | 2:07.6 | |
| 14 |  Hanny Wiano | GRD 272 | Hart | 2:08.9 | |
| 15 |  Kiyoshi Misaki | Brabham BT30 | Toyota | 2:11.1 | |
| 16 | Steve Millen | Elden Mk. 8 | Ford | 2:12.7 | |
| 17 | Harvey Simon | Elfin 600B | Ford | 2:13.6 | |
| 18 | John Green | Chevron B20 | Hart | 2:14.4 | |
| 19 | Dave Hayward | Hawke | Ford | 2:31.8 | |
| 20 | Chong Boon Seng | Brabham BT30 | 2:49.1 | ||
| Pos | Driver | Constructor | Laps | Time/Retired | Grid | |
|---|---|---|---|---|---|---|
| 1 | Vern Schuppan | March-Hart | 50 | 1:38:58.3 | 2 | |
| 2 | Graeme Lawrence | Surtees-Hart | 50 | +38.5 | 1 | |
| 3 | John MacDonald | Brabham-Hart | 49 | +1 lap | 5 | |
| 4 | Max Stewart | Rennmax-England | 49 | +1 lap | 7 | |
| 5 | Tony Stewart | Dolphin-England | 49 | +1 lap | 8 | |
| 6 | Ken Smith | March-Hart | 47 | +3 laps | 4 | |
| 7 | Jan Bussell | Palliser-BRM | 47 | +3 laps | 13 | |
| 8 | Steve Millen | Elden-Ford | 43 | +7 laps | 16 | |
| 9 | Leo Geoghegan | Birrana-Hart | 41 | +9 laps | 3 | |
| 10 | Harvey Simon | Elfin-Ford | 40 | +10 laps | 17 | |
| ? | Percy Chan | Lotus-RES | 12 | |||
| ? | Hanny Wiano | GRD-Hart | 14 | |||
| ? | Kiyoshi Misaki | Brabham-Toyota | 15 | |||
| ? | John Green | Chevron-Hart | 18 | |||
| ? | Dave Hayward | Hawke-Ford | 19 | |||
| ? | Chong Boon Seng | Brabham | 20 | |||
| Ret | Sonny Rajah | March-Hart | 25 | Battery | 9 | |
| Ret | Malcolm Ramsay | Birrana-Hart | 17 | Fuel tank | 6 | |
| Ret | Mike Hall | Brabham-Hart | 7 | Radiator | 11 | |
| DNS | Albert Poon | Brabham-Hart | Engine | 10 | ||
| DNS |  Brian Robertson | Brabham-Hart | Practice crash | — | ||
| DNS | Robert Silitonga | GRD-Hart | Practice crash | — | ||