Merlin Bf-109
Wiki appears to suggest the Buchon's slightly faster than a 109G, but doesn't say at what altitude, and has a substantially lower service ceiling.
It's also apparently heavier which, considering the DB605 has an even greater capacity than a Griffon, seems odd.
On balance, I think I'll stick with my first comment.
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The Buchon ( HA-1112-M1L ) was about 100kg heavier than the 109G-2 on which it was based, but managed another 1,000ft/min initial climb given that it had nearly 200hp more at take-off. And a big four-bladed prop to deliver that.
Range seems to have increased by about 40% to 480 miles, but with no data on how that was achieved. German range data was usually based on a faster-than-Allies cruising speed, for the G-2 about 340 miles at 320 mph.
Buchon claimed 415 mph at 13,000ft, G-2 369 mph at 16,400ft. G-2 had the advantage of GM-1 boost at higher altitudes ( 400+ mph ) but I don't have any performance figures for the Buchon al higher altitudes.
Annoyingly as I was looking into this I just realised that William Green's lauded "Warplanes of the Third Reich" has translated all the original performance data into Imperial measurements, with no reference back to the original German numbers. Daft. So I've just had to use them here in the absence of another reference to hand.
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Incidentally, my limited exploration of Spanish suggests that buchón means a bird that can swell its crop. Which makes sense since the Merlin-engined HA-1112 had a big 'throat' bulge versus the earlier Hispano-engined versions.
"Here comes bulgy!"
"Here comes bulgy!"
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It seems you are both correct. Buchón apparently means male dove, referring to the Pouter breed. The Pouter pigeons are domesticated varieties of the rock dove, Columba livia, characterized by a very large, inflatable crop.
