Peterbilt 579 vs Volvo FMX
The Peterbilt 579 is ahead on: bigger fuel tank, narrower to transport.
Below, every figure both makers publish sits side by side, with the Peterbilt 579 and the Volvo FMX drawn to the same scale from their dimension drawings.
At a glance
Bold is the machine ahead on each figure, with its lead.
| Figure | Peterbilt 579 | Volvo FMX |
|---|---|---|
| Fuel tankHigher is better | 568 L+72% | 330 L |
| Overall widthLower is better | 2.388 m+4% | 2.5 m |
All specifications
Every figure the makers publish. Search for one, or show only those that differ.
Dimensions
Bumper to back of cab (BBC)3.15 m124 in BBC; SBFANot published
Front overhang1.234 m1.52 m
Front of frame to front axle0.795 mFOFNot published
Front axle to back of cab1.882 mFAX to BOC1.005 m
Cab height above frame2.052 mFrom bottom of frame railNot published
Cab floor height above frame0.406 mFrom bottom of frame railNot published
Overall width2.388 mTop view, excluding mirrors2.5 mcab width
Width over mirrors3.063 mFront viewNot published
Bumper to back of cab (118 in BBC variant)2.997 m579-118 SBFANot published
Front axle to back of cab (118 in BBC variant)1.732 m579-118 SBFA; FAX to BOCNot published
Sleeper roof height above frame (44 in low roof)2.126 mNot published
Sleeper roof height above frame (58 in low roof)2.172 mNot published
Sleeper roof height above frame (58 in high roof)2.586 mNot published
Sleeper roof height above frame (72 in high roof)2.586 mNot published
Sleeper roof height above frame (80 in high roof)2.637 mNot published
Sleeper length (44 in sleeper)0.914 mNot published
Sleeper length (58 in sleeper)1.219 mNot published
Sleeper length (72 in sleeper)1.6 mNot published
Sleeper length (80 in sleeper)1.753 mNot published
Cab-to-sleeper opening height (low roof)1.245 mDimension A, walkthrough openingNot published
Cab-to-sleeper opening width (low roof)1.73 mDimension B, walkthrough openingNot published
Cab-to-sleeper opening height (high roof)1.689 mDimension A, walkthrough openingNot published
Cab-to-sleeper opening width (high roof)1.73 mDimension B, walkthrough openingNot published
Sleeper headroom (80 in UltraLoft)2.438 mNot published
Sleeper storage volume (80 in UltraLoft)1.98 m³Not published
Overall lengthNot published7.295 m
Overall height (cab roof)Not published3.153 m
WheelbaseNot published3.6 m
Theoretical wheelbaseNot published4.285 m
Tandem axle spacingNot published1.37 m
Rear overhangNot published0.805 mfrom last axle
Rear axle to back of cabNot published2.545 m
Frame heightNot published1.112 munladen, chassis height CHH-HIGH
Turning circleNot published15.1 m
Weight
Front axle capacity6,622 kgNot published
Rear axle capacity20,865 kgNot published
Front axle capacity (minimum option)5,443 kgNot published
Rear axle capacity (minimum option)9,525 kgNot published
Rear tandem axle rating (PACCAR DX-40)18,144 kgTandem GAWRNot published
Max gross combination weight (PACCAR DX-40 axle)36,287 kgAxle GCW limitNot published
Max operating weight (PACCAR MX-13 engine)63,503 kgNot published
Max operating weight (PACCAR MX-11 engine)49,895 kgEngine maximum operating weightNot published
Max gross combination weight (PACCAR TX-12 transmission)49,895 kgStandard TX-12 limitNot published
Max gross combination weight (PACCAR TX-12 PRO transmission)31,751 kgNot published
Max operating weight (PACCAR TX-18 transmission)63,503 kgNot published
Engine dry weight (PACCAR MX-13)1,134 kgNot published
Engine dry weight (PACCAR MX-11)998 kgNot published
Kerb weightNot published8,765 kg
GVWNot published26,000 kgplated; 28,500 kg design
GCWNot published44,000 kgplated and design
Front axle loadNot published7,500 kgplated and design
Rear axle loadNot published19,000 kgbogie, plated; 21,000 kg design
Engine
Engine modelPACCAR MX-13, PACCAR MX-11, Cummins X15, Cummins X15N, Cummins ISX12N, Cummins L9NVolvo D13C380 / D13C420 / D13C460 / D13C500 / D13C540 (11 litre D11C330-D11C450 also offered)
Gross power451 kW (605 hp)Cummins X15, top rating280-397 kW (380-540 hp)D13C range, at 1,400-1,900 rpm
Max torque2,779 NmCummins X15, top rating1,900-2,600 NmD13C range, at 1,000-1,450 rpm
Displacement (PACCAR MX-13)12.9 LNot published
Power (PACCAR MX-13)380 kW (510 hp)Not published
Torque (PACCAR MX-13)2,508 NmNot published
Displacement (PACCAR MX-11)10.8 LNot published
Power (PACCAR MX-11)332 kW (445 hp)Not published
Torque (PACCAR MX-11)2,305 NmNot published
Displacement (Cummins X15)15 LNot published
Displacement (Cummins X15N)14.5 LNot published
Power (Cummins X15N)373 kW (500 hp)Maximum rating, up to 500 hpNot published
Torque (Cummins X15N)2,508 NmMaximum rating, up to 1,850 lb-ftNot published
Displacement (Cummins ISX12N)11.9 LNot published
Power (Cummins ISX12N)298 kW (400 hp)Maximum rating, up to 400 hpNot published
Torque (Cummins ISX12N)1,966 NmMaximum rating, up to 1,450 lb-ftNot published
Displacement (Cummins L9N)8.9 LNot published
Power (Cummins L9N)239 kW (320 hp)Single ratingNot published
Torque (Cummins L9N)1,356 NmSingle ratingNot published
EmissionsNot publishedEuro 5
DisplacementNot published13 L
Transmission
TransmissionPACCAR TX-12 PRO automated (engines up to 1,000 lb-ft, GCWR up to 70,000 lb)Not published
Sleeper options44 in to 80 in; 80 in UltraLoftNot published
Transmission (PACCAR TX-12)12-speed automated, on-highway fuel efficiency; 2 reverse; max engine 510 hp / 1,850 lb-ft; max GCWR 110,000 lb; system weight 657 lb (298 kg)Not published
Transmission (PACCAR TX-12 PRO)12-speed automated, extreme-duty clutch; max engine 455 hp / 1,700 lb-ft; max GCWR 70,000 lb; system weight 665 lb (302 kg)Not published
Transmission (PACCAR TX-18)18-speed automated, vocational / heavy haul; max engine 510 hp / 1,850 lb-ft; max operating weight 140,000 lb; system weight 808 lb (367 kg)Not published
Transmission (Endurant HD)12-speed automated, on-highway fuel efficiencyNot published
Transmission (Endurant XD)18-speed automated, vocational, heavy haul, high performanceNot published
Transmission (Eaton FR/RT)Manual; 9, 10, 11, 13, 15 or 18 speedsNot published
Transmission (Eaton UltraShift PLUS)Automated; 10, 11, 13 or 18 speedsNot published
Drive axle ratio range (PACCAR DX-40)2.47 to 3.70; 1,650 lb-ft straight torque rating, 1,850 lb-ft multi-torque ratingNot published
GearboxNot publishedI-Shift AT2612 automated 12-speed, GCW 60 t (standard)
Gearbox optionsNot publishedI-Shift AT2412F / AT2612F / ATO2612F / SPO2812; Powertronic PT2106 / PT2606 fully automatic
Rear axlesNot publishedRTS2370D single reduction 23 t tandem with diff locks, GCW 70 t (standard)
Capacities
Fuel tank568 L330 Lstandard aluminium tank, 710 mm diameter
Fuel tank (smallest option)151 LNot published
Fuel tank diameters20 in, 23 in or 26 inNot published
DEF tank (small)38.6 LNot published
DEF tank (medium)60.9 LNot published
DEF tank (large)76.1 LNot published
DEF tank (medium aero)52.6 LNot published
DEF tank (large aero)67.8 LNot published
Service intervals
Engine oil and filter120,000 km20,000-100,000 km by operating condition
Fifth wheel24,000 kmor monthly: inspect, greaseNot published
Axle and gearbox first-fill oilfirst change at 3,000-5,000 mi (4,800-8,000 km); level check every 15,000 mi (24,000 km)Not published
Fuel filtersNot publishedat each engine oil changeD13A, fuel filter and water separator
CoolantNot published500,000 kmVolvo Coolant VCS, or every 48 months
Transmission oilNot published180,000 km / 12 months, or 400,000 km / 36 months
Axle oilNot published180,000 km / 12 months, or 400,000 km / 36 months
Air filter (outer)Not publishedwhen the indicator shows, at least every 24 months
Air filter (inner)Not publishedevery third outer-filter change, at most 48 months
Tyres
TyresNot published315/80 R22.5 front and drive
Service capacities
AdBlue tankNot published64 Lstandard, for 710 mm fuel tanks
Engine oil, with filterNot published33 L (plastic sump) / 37 L (steel sump)
Cooling systemNot published42 L
Sources: Peterbilt 2024 Heavy Duty Body Builder Manual, Rev A (May 2024), Figure 3-4 Model 579-124 SBFA overall dimensions · Volvo Trucks model range sheet FMX 13 6x4 Tractor - B/T Ride - N3 or N3G, FMX 64T 3L 01 GBR (2026-09-25)
Drawn to scale
Side views measured off each maker's dimension drawing, front edges and ground lined up.
Peterbilt 579 vs Volvo FMX: questions
Which has the bigger fuel tank, the Peterbilt 579 or Volvo FMX?
The Peterbilt 579: Peterbilt 579 568 L, Volvo FMX 330 L (fuel tank), a 72% difference.
Which is narrower to transport, the Peterbilt 579 or Volvo FMX?
The Peterbilt 579: Peterbilt 579 2.388 m, Volvo FMX 2.5 m (overall width), a 4% difference.
Where do these figures come from?
Each model's own published spec sheet or brochure, linked under the table. Builds differ by market and year, so confirm the figures for a particular machine with its dealer.
Can I rent or buy these machines in the UAE?
Each model's page lists the ones for hire and for sale on EquipmentsFinder now, with typical prices in AED.
