I too had the 'carbed' version, many years before I got the XJ12 C injected version.
IIRC the carbs got around 8 - 10 MPG? Stock injected near 20, my modified version built and set for strip...........4!
And smooth, oh yes. When set up correctly they were like sewing machines, sadly many mechanics did not put in the extra work to change all the plugs for example, I had seen many V12's with just 6 or 8 plugs changed, releasing the AC compressor for example to get to the front 4 was often left for someone else to pick up.
regards
Dave
IIRC the carbs got around 8 - 10 MPG? Stock injected near 20, my modified version built and set for strip...........4!
And smooth, oh yes. When set up correctly they were like sewing machines, sadly many mechanics did not put in the extra work to change all the plugs for example, I had seen many V12's with just 6 or 8 plugs changed, releasing the AC compressor for example to get to the front 4 was often left for someone else to pick up.
regards
Dave