Is is quite hard question actually how fast 109 E-3/E-4 was at the deck.
Most data claimed for 1.3 Ata power ( 5 minut emergency) - 460-467 km/h
Probably it would be at 1.42/1.45 Ata (1 minut emergency) about 480-500 km/h.
German manual for E-3 claimed 500 km/h at deck.
Spitfire MK1 at 6 lbs reached ab. 460 km/h and at 12 lbs ( 5 minut emergency) reached 505 km/h.
Hurricane MK1 at 6 lbs reached 426 km/h and at 12 lbs reached 460 km/h.
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