| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | Renault Billancourt engine - Different cylinder capacity |  |  |  |  |  |
| 3 | engine types | 690 | 662-2 - 680 | 662-1 | 839 | B1B - 670 - 800 - Ventoux1093 |
| 4 | cylinder capacity | 0.6 L (603 cc) | 0.7 L (747 cc) | 0.8 L (760 cc) | 0.8 L (782 cc) | 0.8 L (845 cc) |
| 5 | bore | 49 mm (1.93 in) | 54.5 mm (2.15 in) | 55 mm (2.17 in) | 55.8 mm (2.20 in) | 58 mm (2.28 in) |
| 6 | stroke | 80 mm (3.15 in) | 80 mm (3.15 in) | 80 mm (3.15 in) | 80 mm (3.15 in) | 80 mm (3.15 in) |

Question: What were the sizes of the bore and stroke reduced to?
Answer: The size of the bore was reduced from 55 to 54.5 mm (2.17 to 2.15 in), while the stroke remained unchanged.