| Lancia Theta | |
| Aka: | Lancia Theta-35HP |
| Manufacturer: | Lancia |
| Layout: | FR layout |
| Engine: | 4941.72 cc sidevalve I4 |
| Production: | 1913-1918 |
| Predecessor: | Lancia Epsilon |
| Successor: | Lancia Kappa |
| Body Style: | Torpedo |
| Weight: | 10600NaN0 |
| Wheelbase: | 3101NaN1 3371NaN1(long version) |
| Length: | 4651NaN1 5001NaN1(long version) |
| Width: | 161.51NaN1 161.91NaN1(long version) |
| Transmission: | 4-speed manual gearbox |
The Lancia Theta (25/35 HP, type 61) is a car which was produced between 1913-1918 by Lancia. The car was a bigger version of the Epsilon model. The car had electrical lights and start motor.