Dudes, back in the 19-oughts, if you wanted to go fast, the engines got REAL BIG. what's interesting about that car - besides EVERYTHING - is that it was built by Darracq solely to take the land speed record back to france. prior to 1905, Darracq raced a four banger of about 12 litres, good for 90-100 hp. the designer decided to put two four banger blocks on a common crankcase, using one ofthe four cylinder cranks. the connecting rods big ends are fork-and-blade, so there's no offset to teh cylinder banks. the car was owned from about 1907 on by Alex Guinness (YES that Guinness) but was broken up in the 19teens or so, and only the engine was saved. the car was entirely rebuilt in the early 2000s and started in time for its 100th birthday in 2005. they really didn't ahve to do much to the engine, beyond replacing the origina CAST IRON pistons with custom made alluminum pieces...
Jack, cylinder bore is 170mm - 6.693 inches. interestingly its a very oversquare engine, B&S 170mm X 110mm. there really are no original ideas eh?
go to youtube and seach on darracq V8...VERY entertaining.
and this nice littel history of teh car...
http://www.villiers.info/Darracq/
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The B-3 build log:
http://www.locostusa.com/forums/viewtopic.php?f=36&t=13941 unfortunately, all the pictures were lost in the massive server crash
The beginnings of the Jag Special,
https://www.locostusa.com/forums/viewtopic.php?f=36&t=19012Again, all pictures were lost.