Bührer RP-21 Super (A) Transmission specs

The fastest speed on record for a RP-21 Super (A) is 15.5 mph (25 km/h). The gearbox itself is not on record yet.

10 transmission values on record for the RP-21 Super (A).

Engine power, claimed · gross or net not stated

71 hp

53 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “Bührer RP 21 Super (A)”, claimed

This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.

How fast will a RP-21 Super (A) go?

The fastest speed on record for a RP-21 Super (A) is 15.5 mph (25 km/h). The gearbox itself is not on record yet.

Transmission — RP-21 Super (A) Transmission
Drive	Available in two-wheel and four-wheel drive
Forward gears	15
Reverse gears	3
Transmission as described	15 forward/3 reverse
Top speed forward	15.5 mph · 25 km/h
Top speed reverse	5.6 mph · 9.0 km/hhighest reverse speed printed in the article's speed tables
Service brakes	pedal-operated internal expanding shoe brake acting on the pinion shaft
Steering	mechanically operated spindle steering
Differential lock	mechanically operated differential lock
Front axle	oscillating steel front axle

Source · Traktorenlexikon, “Bührer RP 21 Super (A)”

10 transmission values from Traktorenlexikon, “Bührer RP 21 Super (A)”.

Sources checked

14 SEP 2026

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

Traktorenlexikon: Bührer RP 21 Super (A) — CC BY-SA 4.0, WIKIBOOKS-TL-119785 · revision 1042467. Wikibooks contributors (Traktorenlexikon). Original document