| Car Name: | Lotus 109 |
| Category: | Formula One |
| Constructor: | Lotus |
| Designer: | Peter Wright (Technical Director) Chris Murphy (Chief Designer) |
| Predecessor: | 107 |
| Successor: | 112 |
| Team: | Team Lotus |
| Technical Ref: | [1] |
| Chassis: | Carbon fibre monocoque |
| Front Suspension: | Double wishbones, pushrod |
| Rear Suspension: | Double wishbones, pushrod |
| Wheelbase: | 2950NaN |
| Track: | Front: 1650NaN Rear: 1600NaN |
| Engine Name: | Mugen-Honda MF-351HC, |
| Configuration: | V10, |
| Capacity: | 35001NaN1, |
| Turbo/Na: | NA, |
| Engine Position: | mid-engine, longitudinally-mounted |
| Power: | 725 hp @ 13,500 rpm[2] |
| Gearbox Name: | Lotus / Xtrac |
| Gears: | 6-speed |
| Type: | semi-automatic |
| Fuel: | Mobil1 |
| Tyres: | Goodyear |
| Weight: | 515NaN |
| Debut: | 1994 Spanish Grand Prix |
| Last Event: | 1994 Australian Grand Prix |
| Races: | 12 |
| Wins: | 0 |
| Cons Champ: | 0 |
| Drivers Champ: | 0 |
| Poles: | 0 |
| Fastest Laps: | 0 |
| Podiums: | 0 |
The Lotus 109 was a Formula One car used by Team Lotus in the latter part of the 1994 Formula One season. It was designed by Chris Murphy who based the car on his Lotus 107 model. It was powered by a Mugen-Honda V10. Johnny Herbert was able to keep Lotus competitive in Belgium and Monza with the car, but funds were drying up and development was limited. At the end of the season, the car was retired and Team Lotus went into receivership.
(key)
| Year | Entrant | Engine | Tyres | Drivers | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | Points | WCC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Team Lotus | Mugen-Honda V10 | BRA | PAC | SMR | MON | ESP | CAN | FRA | GBR | GER | HUN | BEL | ITA | POR | EUR | JPN | AUS | 0 | - | |||
| Johnny Herbert | Ret | 8 | 7 | 11 | Ret | Ret | 12 | Ret | 13 | |||||||||||||
| Alessandro Zanardi | Ret | Ret | Ret | 13 | Ret | 16 | 13 | Ret | ||||||||||||||
| Philippe Adams | Ret | 16 | ||||||||||||||||||||
| Éric Bernard | 18 | |||||||||||||||||||||
| Mika Salo | 10 | Ret |