Performance: HOLIDAY RAMBLER Chassis Performance Chart

Why do more racing enthusiasts choose a motorhome built on a Roadmaster chassis? It’s simple — performance. Roadmaster is recognized as the chassis that leads the way with innovations and new technologies; all to deliver the kind of power and handling that earns the respect of professional drivers across the country.

Roadmaster’s commitment to performance means:
  • More engine choices than any other motorhome chassis
  • The fastest introduction of new engines
  • Ongoing research and development with engine manufacturers to introduce improved
    • power plants to the RV industry
HOLIDAY RAMBLER Chassis Performance Chart:
Chassis:
RSR
RR4R
RR8R
RR8R
RR8S/10S
S-Series
S-Series
S-Series
FEATURE
Engine
Cummins®
ISB-AD 340
Cummins® ISB 340
Cummins® ISC 360
Cummins® ISL 400
Cummins® ISL 425
Cummins® ISM 500
Cummins® ISX 525
Cummins® ISX 650
Horsepower/
Torque
340 HP 660 lb-ft @ 1,600 RPM
340 HP 860 lb-ft @ 1,600 RPM
360 HP 1,050 lb-ft @ 1,400 RPM
400 HP 1,200 lb-ft @ 1,300 RPM
425 HP 1,200 lb-ft @ 1,300 RPM
500 HP 1,550 lb-ft @ 1,300 RPM
525 HP
1,650 lb-ft @ 1,200 RPM
650 HP 1,950 lb-ft @ 1,200 RPM
Transmission
Allison® 2100 MH 6-speed with Transynd™ ATF
Allison® 2500 MH 6-speed with Transynd™ ATF
Allison® 3000 MH 6-speed with Transynd™ ATF
Allison® 3000 MH 6-speed with Transynd™ ATF
Allison® 3000 MH 6-speed with Transynd™ ATF
Allison® 3000 MH 6-speed with Transynd™ ATF
Allison® 4000 MH 6-speed with Transynd™ ATF
Allison® 4000 MH 6-speed with Transynd™ ATF
Cooling System
Rear mounted, stacked aluminum charged air cooler and aluminum radiator
Rear mounted, stacked aluminum charged air cooler and aluminum radiator with transmission cooler
Rear mounted, stacked aluminum charged air cooler and aluminum radiator with transmission cooler
Rear
mounted, stacked aluminum charged air cooler and aluminum radiator with transmission cooler
Side mounted, aluminum charged air cooler and aluminum radiator with transmission cooler
Side mounted, aluminum charged air cooler and aluminum radiator with transmission cooler
Side mounted, aluminum charged air cooler and aluminum radiator with transmission cooler
Side mounted, aluminum charged air cooler and aluminum radiator with transmission cooler
Hitch Capacity
4,000 Lbs.
7,000 Lbs.
10,000 Lbs.
10,000 Lbs.
10,000 Lbs.
10,000 Lbs.
10,000 Lbs.
10,000 Lbs.
Application
Holiday Rambler Vacationer XL
Holiday Rambler Neptune
Holiday Rambler Ambassador
Holiday Rambler Endeavor
Holiday Rambler Scepter
Holiday Rambler Imperial
Holiday Rambler Navigator
Holiday Rambler Navigator