One thing I just can't get my brain around is the specs for comparable Kohler engines. I was raised to believe in cubic inches and torque (ex-farm boy). If you check out the specs for same hp Command vs Courage models, the courage has a larger displacement and greater torque.
Here's the 20hp vertical shaft models as an example:
MODEL Command PRO CV20
MAX. POWER @ 3600 RPM hp (kW) 20 (14.9)
DISPLACEMENT cu. in. (cc) 38.0 (624)
BORE in. (mm) 3.03 (77)
STROKE in. (mm) 2.64 (67)
PEAK TORQUE @ MAXIMUM lbs. ft. (Nm) 32.6 (44.2) @ 2600
COMPRESSION RATIO 8.5:1
DRY WEIGHT lbs. (kg) 90 (41)
OIL CAPACITY U.S. quarts (liters) 2.0 (1.9)
LUBRICATION Full pressure w/full-flow filter
DIMENSIONS L x W x H in. 21.2 x 17.7 x 14.3
MODEL Courage SV710
MAX. POWER @ 3600 RPM hp (kW) 20 (14.9)
DISPLACEMENT cu. in. (cc) 44 (725)
BORE in. (mm) 3.3 (83)
STROKE in. (mm) 2.6 (67)
PEAK TORQUE @ MAXIMUM lbs. ft. (Nm) 40.0 (54.2) @ 2000
COMPRESSION RATIO 9:1
DRY WEIGHT lbs. (kg) 91 (41.3)
OIL CAPACITY U.S. quarts (liters) 2.0 (1.9)
LUBRICATION Full pressure w/full-flow filter
DIMENSIONS L x W x H in. 18.5 x 17.8 x 13.4
Briggs doesn't list torque data on their site, but here again, the ELS engines have larger displements vs same hp Vangaurds.
Extended Life Series V-Twin
Power Level 20, 21, 22
Displacement (cc/cubic in.) 656/40.00
Bore (in.) 2.97
Stroke (in.) 2.89
Weight (lbs.) 81.00
Oil Capacity (oz.) 64
Valve OHV
Cylinders 2 Cast Iron Sleeve
Air Cleaner Dual-Clean
Lubrication Pressure Lubrication w/ oil filter
Ignition Magnetron
Vangaurd V-Twin OHV 21, 23
Power Level 21, 23
Displacement (cc/cubic in.) 627/38.26
Bore (in.) 2.97
Stroke (in.) 2.75
Weight (lbs.) 77.00
Oil Capacity (oz.) 56
Valve OHV
Cylinders 2 Cast Iron Sleeve
Air Cleaner Dual-Clean
Lubrication Pressure Lubrication w/ oil filter
Ignition Magnetron