| Jo Bonnier | Keke Rosberg | |
|---|---|---|
| Career | ||
| Championships | — | 1 |
| Career span | 1956–1971 | 1978–1986 |
| Seasons | 16 | 9 |
| Race starts | 104 | 114 |
| Teams | Maserati, BRM, Porsche, Cooper, Brabham, McLaren, Lotus | Theodore, Wolf, Fittipaldi, Williams, McLaren |
| Wins & podiums era-dependent · not directly comparable across eras | ||
| Wins | 1 | 5 |
| Podiums | 1 | 17 |
| Poles | 1 | 5 |
| Fastest laps | 0 | 3 |
| Era-fair rates career rate · across all seasons | ||
| Win % | 1.0% | 4.4% |
| Podium % | 1.0% | 14.9% |
| Pole % | 1.0% | 4.4% |
| Reliability & consistency era-dependent · see explanation | ||
| DNF rate | 51.0% | 46.5% |
| Points-finish rate | 19.2% | 33.3% |
| Points scoring-era variable · not directly comparable | ||
| Career total | 39 | 159.5 |
The share of race starts that ended without a classified finish. Formula: races not finished ÷ race starts × 100. Races the driver did not start are excluded from both sides. A disqualification counts as a finish that scored nothing, not a DNF. Why it sits apart from the era-fair rates: unlike a win or a podium, finishing meant something very different in different eras. Cars in the 1950s–70s broke constantly; modern cars almost always reach the flag. A high DNF rate in 1955 says far more about the machinery than the driver. Comparing two drivers within the same season is meaningful — they faced the same conditions. Across eras it's context, not a verdict.
The share of race starts that ended in a points-paying position. Formula: races finished in a scoring position ÷ race starts × 100, using that season's real points system. Why it's era-dependent: the number of positions that pay points has changed repeatedly — the top five scored in 1950, the top ten score today. A modern driver has roughly twice as many scoring positions available for the same relative performance, so a higher percentage doesn't necessarily mean a better driver. Like DNF rate, it's shown as context.