Kenworth T680
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Specification sheetIssued 4 November 2026

Kenworth · truck

Kenworth T680

Kenworth T680 (current North American build): drawings are the standard hood with 76 in high-roof sleeper (and the standard hood day cab where noted), 6x4 tandem, set-back front axle, from the Kenworth Heavy Duty Body Builder Manual (September 2024). Engine figures are from the kenworth.com T680 page. US/Canada spec; no Kenworth GCC sheet found. All heights are from the bottom of the frame rail.

USA

BFAFABBBC
Side
Front
BFA
Bumper to front axle
1.283 m
FAB
Front axle to back of cab
1.882 m
BBC
Bumper to back of cab (day cab)
3.165 m

Dimensions

Front axle to back of sleeper (76 in high-roof sleeper, standard hood)
3.548 m
Front axle to rear of roof fairing (76 in high-roof sleeper)
4.039 m
Bumper to back of sleeper (76 in high-roof sleeper, standard hood)
4.829 m
Bumper to rear of roof fairing (76 in high-roof sleeper)
5.296 m
Front axle to front of tilted hood (hood tilt clearance)
2.23 m
Tilted hood height above frame (from bottom of frame rail)
2.047 m
Sleeper roof height above frame
3.198 m
Roof fairing height above frame (76 in high-roof sleeper, top of fairing)
3.238 m
Day cab roof height above frame
2.129 m
Day cab roof fairing height above frame (standard hood day cab)
3.231 m
Width over mirrors (front view)
3.04 m
Cab width (front view)
2.474 m
Cab width (rear view)
2.101 m
Frame width (outside of frame rails)
0.864 m

Engine

Engine model (12.9 L)
PACCAR MX-13
Displacement (MX-13)
12.9 L
Gross power (PACCAR MX-13)
405-510 hp
Max torque (PACCAR MX-13)
1,550-1,850 lb-ft
Engine model (10.8 L)
PACCAR MX-11
Displacement (MX-11)
10.8 L
Gross power (PACCAR MX-11)
355-445 hp
Max torque (PACCAR MX-11)
1,250-1,700 lb-ft

Transmission

Transmission
PACCAR TX-12 automated (with MX-13); PACCAR TX-18 and TX-18 PRO (with MX-11)
Rear axle
PACCAR DX-40 tandem axle (with MX-13)