Warbird Information Exchange

Which piston twin engined WWII fighters regularly went head to head against single engined fighters in daylight operations other than the P-38?

I didn't see the word "successfully" in your question so I'll add the Me-110 to the list.

Bf 110, Ki-45, Whirlwind. Of these, only the Whirlwind (when the engines worked) had much success.

August

Didn't the Mosquito have a day fighter variant?

Beaufighter as well?

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All right, Mister Dorfmann, start pullin'!
Pilot: "Flap switch works hard in down position."
Mechanic: "Flap switch checked OK. Pilot needs more P.T." - Flight report, TB-17G 42-102875 (Hobbs AAF)