| Answer | Crossword Clue |
|---|---|
| DIESEL | Engine or its inventor |
| DIESEL | Engine inventor |
| OTTO | Auto-engine inventor |
| WATT | Steam engine inventor |
| WATT | Engine inventor James |
| WATT | Steam engine inventor. |
| WATT | Steam-engine inventor |
| WATT | Inventor of a steam engine. |
| WATT | Inventor of the steam engine. |
| WATT | Inventor of a steam engine |
| WATT | Scottish inventor of steam engine. |
| DIESEL | Inventor of an eponymous engine |
| OTTO | Four-stroke internal-combustion engine inventor |
| DIESEL | Inventor of the compression-ignition engine |
| DIESEL | Inventor of the compression ignition engine |
| WATT | Inventor with three steam engine patents |
| WATT | Inventor of steam engine (1736-1819). |
