RUPES
RUPES BigFoot LHR21 Mark III Random Orbital Polisher
$490
Released 2018-11
Best Car Polishers · head-to-head
RUPES BigFoot LHR21 Mark III Random Orbital Polisher vs Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher
A sourced, side-by-side comparison. Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher is cheaper at $159. Every spec and price links to its source.
No photo yet
Porter-Cable
Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher
$159Cheaper
Which is better: the RUPES BigFoot LHR21 Mark III Random Orbital Polisher or Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher?
The Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher wins 1 of the 1 specs we compare head to head; the other wins 0. The Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher is the cheaper at $159. The Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher both leads on specs and costs less — the straightforward pick.
See RUPES BigFoot LHR21 Mark III Random Orbital Polisher on Amazon See Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher on Amazon
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | RUPES BigFoot LHR21 Mark III Random Orbital Polisher | Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher |
|---|---|---|
| US price | $490 | $159 Home Depot current retail price |
| Brand | RUPES | Porter-Cable |
| Released | 2018-11 | — |
| Orbit throw (mm) | 21 | 16 |
| Motor power | 500 W | 4.5 A |
| Speed range opm | 3,000-4,500 | 2,500-6,800 |
| Backing plate size (in) | 6 in | 6 in |
| Variable speed | Yes | Yes |
| Action type | free-spin dual-action (random orbital, not gear-driven) | gear-driven dual-action (forced rotation, ball & roller bearing) |
| Cord length (ft) | 30 | 7 |
| Weight (lb) | 5.95 | 5.8 |
Sources — RUPES BigFoot LHR21 Mark III Random Orbital Polisher: rupes.com (verified 2026-08-01). Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher: portercable.com (verified 2026-08-01).
What's the difference between the RUPES BigFoot LHR21 Mark III Random Orbital Polisher and Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- Orbit throw (mm): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 21 vs Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher 16
- Motor power: RUPES BigFoot LHR21 Mark III Random Orbital Polisher 500 W vs Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher 4.5 A
- Speed range opm: RUPES BigFoot LHR21 Mark III Random Orbital Polisher 3,000-4,500 vs Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher 2,500-6,800
- Action type: RUPES BigFoot LHR21 Mark III Random Orbital Polisher free-spin dual-action (random orbital, not gear-driven) vs Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher gear-driven dual-action (forced rotation, ball & roller bearing)
- Cord length (ft): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 30 vs Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher 7
- Weight (lb): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 5.95 vs Porter-Cable 7424XP 6 in. Variable-Speed Random Orbit Polisher 5.8