The Hirth HM 508 was an air-cooled, eight-cylinder, 60º cylinder bank angle inverted-V aircraft engine built in Germany in the 1930s. It had a bore and stroke of 105 mm × 115 mm (4.1 in × 4.5 in) and developed 210 kW (280 hp) at 3,000 rpm.
Applications:
Ambrosini S.7
Heinkel He 116
IMAM Ro.63
Messerschmitt Bf 108
Siebel Fh 104
Specifications:
HM 508D
Type: Eight-cylinder 60-degree inverted V inline engine
Bore: 105 mm
Stroke: 115 mm
Displacement: 7.97 L
Length: 1,289 mm
Width: 683 mm
Height: 815 mm
Dry weight: 208 kg
Power output: 280 hp at 3,000 rpm
Compression ratio: 6:1
All Aero 