Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Renault Billancourt engine
Table title:
Different cylinder capacity
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > engine types </th><th colspan=1 rowspan=1 > 690 </th><th colspan=1 rowspan=1 > 662-2 - 680 </th><th colspan=1 rowspan=1 > 662-1 </th><th colspan=1 rowspan=1 > 839 </th><th colspan=1 rowspan=1 > B1B - 670 - 800 - Ventoux1093 </th></tr>
<tr> <td colspan=1 rowspan=1 > cylinder capacity </td><td colspan=1 rowspan=1 > 0.6 L (603 cc) </td><td colspan=1 rowspan=1 > 0.7 L (747 cc) </td><td colspan=1 rowspan=1 > 0.8 L (760 cc) </td><td colspan=1 rowspan=1 > 0.8 L (782 cc) </td><td colspan=1 rowspan=1 > 0.8 L (845 cc) </td></tr>
<tr> <td colspan=1 rowspan=1 > bore </td><td colspan=1 rowspan=1 > 49 mm (1.93 in) </td><td class="highlighted"  colspan=1 rowspan=1 > 54.5 mm (2.15 in) </td><td class="highlighted"  colspan=1 rowspan=1 > 55 mm (2.17 in) </td><td colspan=1 rowspan=1 > 55.8 mm (2.20 in) </td><td colspan=1 rowspan=1 > 58 mm (2.28 in) </td></tr>
<tr> <td colspan=1 rowspan=1 > stroke </td><td class="highlighted"  colspan=5 rowspan=1 > 80 mm (3.15 in) </td></tr>
</table>
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.