Frontal areas of WW2 aero engines

I was wondering if anyone has any definitive figures on the frontal areas of various WW2 piston powered aero engines?

All I can find are comparative figures (eg the Griffon has 6% greater frontal area than the Merlin. The Sabre had 24% greater frontal area than the Griffon)

Also, frontal area per hp would be interesting for comparison. I know there are some USAAF and NACA documents comparing frontal drag rations and power/drag ratios for R-1830/R-2800/V-1710 engines out there, I just can't find them anymore...

This data is from Paul H. Wilkinson's series entitled "Aircraft Engines of the World"

Engine Type Frontal Area sq ft
Sakae 21 10.6
Atsuta 21 5.4
BMW801D 14.7
Ju213-A 6.3
Db601E 5.4
Db603A 7.0
Db605B 6.9
Db605A 5.5
Gnome-Rhone 14N 14.0
Fiat A74-RC38 11.9
Klimov M105P 5.5
M-82FNW 13.4
AM-38A 5.8
Centaurus 57 16.6
Sabre Va 8.8
Pereus 100 16.6
Merlin X,XX,45 5.8
Merlin 61,63 6.1
Merlin 66,100 series 7.5
Griffon 65, 69 7.9
Allison V1710-C15 6.2
V1710-89,F17 6.1
V1710-131 6.2
Packard V1650-1 5.8
V1650-3,7 5.9
V1650-9 7.5
P&W R1830- Series 12.6
R2000-D 13.4
R2800-B Series 15.0
Wright R1820-G&H Series 16.6
R2600 B Series 16.0
R3350 B Series 17.0
RR Derwent 1, V 10.1
GE I-40 (J33) 14.7
DH Goblin II 13.6
BMW 003 A2 (TL 109-003) 4.0
Junkers Jumo 004 B4 (TL 109-004) 4.9
Hirth He 011 (TL 109-011) 6.4
BMW 018 (TL 109-018)13.1
(TL 109-018)

I have alot of his volumes unfortunately they are home in storage as I only work in Saudi