Driver Bio
| Nationality | Dutch |
| Birthplace | Bloemendaal, Netherlands |
| Born | 16 March 1942 |
| First Grand Prix | 1971 Dutch Grand Prix |
| Last Grand Prix | 1975 German Grand Prix |
| Years Active | 1971, 1973 – 75 |
| Current/Last Team | Ensign |
Grand Prix Stats
| Race Entries | 10 |
| Race Starts | 8 |
| Did Not Start | 1 |
| Best Race Start | 20th ( |
| Best Race Finish | 6th ( |
| Retirements | 1 |
| First-Lap Retirements | 0 |
| Not Classified | 0 |
| Disqualified | 0 |
| Did Not Qualify | 1 |
Qualifying
| Qualifying Sessions | 9 |
| Reached Q3 | – |
| Q2 Eliminations | – |
| Q1 Eliminations | – |
| Did Not Qualify | 1 |
Points
Stats by Season
| Year | Constructor | Entries | Starts | Wins | Podiums | Poles | Fastest Laps | Front Rows | DNF | Best Start | Best Result | Pts Finishes | Points | Championship |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1971 | Surtees | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 21 | 8 | 0 | 0 | NC |
| 1973 | Frank Williams Racing Cars | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 20 | 6 | 1 | 1 | 19th |
| 1974 | Frank Williams Racing Cars | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 30 | 14 | 0 | 0 | NC |
| 1975 | Ensign | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 22 | 6 | 1 | 1 | 19th |
Stats by Constructor
| Constructor | Years | Entries | Starts | Wins | Podiums | Poles | Fastest Laps | Front Rows | DNF | Best Start | Best Result | Pts Finishes | Points |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Surtees | 1971 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | – | – | 0 | 0 |
| Surtees | 1971 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 21 | 8 | 0 | 0 |
| Frank Williams Racing Cars | 1973–1974 | 5 | 4 | 0 | 0 | 0 | 0 | 0 | 1 | 20 | 6 | 1 | 1 |
| Ensign | 1975 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 22 | 6 | 1 | 1 |
Teammates & Qualifying Head-to-Head
| Teammate | Years | Races | Qualifying H2H |
|---|---|---|---|
| Sam Posey | 1971 | 1 | – |
| Mike Hailwood | 1971 | 1 | – |
| Howden Ganley | 1973 | 3 | – |
| Arturo Merzario | 1974 | 2 | – |
