2026 Tiffin Allegro Bus

Full specifications

Model year

2026

Variant

Model-year overview

Chassis maker

Not documented

Chassis

PowerGlide XC raised-rail rear-engine diesel

Engine maker

Cummins

Engine

L9

Displacement (L)

Not documented

Horsepower

450

Torque (lb-ft)

1250

Transmission

Allison 3000 MH 6-speed automatic

Length (ft)

Not documented

Height (ft)

13.25

Width (in)

101

Slides

4

Floorplan

Not documented

Generator maker

Onan

Generator

Quiet Diesel

Generator (kW)

10

Fuel (gal)

150

Fresh water (gal)

100

Gray water (gal)

100

Black water (gal)

55

Luxury systems

Aqua-Hot 450D hydronic heating; three 15,000-BTU roof air conditioners with heat pumps; 3,000-watt inverter-charger; solar panels optional; air leveling with hydraulic jacks; adaptive cruise control and collision mitigation.

Intended use

Not documented

Floorplans offered in 2026

36 AP40 IP45 OPP

Other 2026 records

• 36 AP
• 40 IP
• 45 OPP

What changed this year

Against the 2025 sheet, the floorplan list changes from 35 CP, 40 IP, 45 FP and 45 OPP to 36 AP, 40 IP and 45 OPP; the chassis line, marked updated, names PowerGlide XC for every floorplan; and a 605-horsepower Cummins X15 is listed as an option on the 45 OPP.

Notes

Length varies by floorplan, from 38 ft 2 in (36 AP) to 45 ft (45 OPP); see the floorplan records. Engine figures are for the standard Cummins L9. The sheet lists only the Allison 3000 MH transmission. DEF tank 10 gallons. The sheet does not print a model year on the page; the year comes from its file name and Tiffin's library label. This sheet is the revision dated 12.1.25. The product brochure linked here was not opened.