In 1976, he drove a Brabham for RAM, and in 1977 he drove his own Apollon-Williams, although this car was not a success.
Kessel nowadays run a series of car dealership in Switzerland and his own racing team, competing in Ferrari Challenge series in Italy and the main European series. The team also competes in the FIA GT3 European Championship with the same car.
| Year | Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | Team | WDC | Points |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1976 | RAM | BRA | RSA | USW | ESP DNQ | BEL 12 | MON | SWE Ret | FRA DNQ | GBR | GER | AUT NC | NED | ITA | CAN | USA | JPN | RAM | - | 0 | |
| 1977 | Apollon | ARG | BRA | RSA | USW | ESP | MON | BEL | SWE | FRA | GBR | GER | AUT | NED | ITA DNQ | USA | CAN | JPN | Apollon | - | 0 |