<page_title> Cadillac V8 engine </page_title> <section_title> 500 </section_title> <table> <cell> 10.0:1 <col_header> Engine VIN code </col_header> </cell> <cell> 400 hp (298 kW) @ 4400 rpm <col_header> Engine VIN code </col_header> </cell> <cell> 1971 <col_header> Year </col_header> </cell> <cell> 8.5:1 <col_header> Compression ratio </col_header> </cell> <cell> 365 hp (272 kW) @ 4400 rpm <col_header> Engine letter code </col_header> </cell> <cell> 235 hp (175 kW) @ 4400 rpm <col_header> Engine letter code </col_header> </cell> </table>
In 1971, Cadillac V8 engine compression was reduced from 10.0:1 to 8.5:1, the lowered compression ratio dropped the 500's gross output from (298 kW) to (272 kW) or 235 hp (175 kW).