Morgan Triumph 121, Engine
| Engine capacity | 1,991 cm³ |
| Maximum power (range), hp | 90 - 115 |
| Maximum torque, N*m (kg*m) at rpm. | 158 (16) / 3000 |
| Fuel used | Petrol |
| Fuel consumption, l/100 km | 12.9 - 13.3 |
| Engine type | In-line, 4-cylinder |
| Additional engine information | 2 carburetors Weber 42 DCOE or Weber 45 DCOE |
| Maximum power, hp (kW) at rpm | 100 (74) / 5000 |
| Compression Ratio (Range) | 8.5 - 9 |
| Cylinder diameter (range), mm | 83 |
| Piston stroke (range), mm | 92 |
| Cooling system (range), l | 7.5 |
| Engine lubrication system (range), l | 5.7 |
| Valve drive | OHV |
| Number of valves per cylinder (range) | 2 |