Harley-Davidson Fat Boy vs KTM 390 Duke R

Last Updated: October 22, 2026

KTM 390 Duke R price starts at Rs. 3.47 Lakh, which is Rs. 24.56 Lakh cheaper than the base variant of Harley-Davidson Fat Boy, priced at Rs. 28.03 Lakh. In terms of mileage, the Fat Boy offers a claimed 18.18 kmpl, while the 390 Duke R delivers 30 kmpl. On the performance front, the Fat Boy uses a 1923cc engine producing 104.69 PS @ 5020 rpm and the 390 Duke R a 398.63cc engine producing 46 PS @ 8500 rpm. If you're deciding between the Fat Boy and 390 Duke R, the 390 Duke R is the better pick for affordability and mileage, while the Fat Boy stands out for performance.

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Fat Boy vs 390 Duke R Comparison Summary

Specification Harley-Davidson Fat BoyKTM 390 Duke R
Ex-showroom price (base) Rs. 28.03 LakhRs. 3.47 Lakh
Mileage 18.18 kmpl30 kmpl
Engine 1923 cc398.63 cc
Max power 104.69 PS @ 5020 rpm46 PS @ 8500 rpm
Kerb weight 315 Kg168.3 Kg

Fat Boy vs 390 Duke R Key Highlights

Basic Info Harley-Davidson Fat Boy STDKTM 390 Duke R STD
Rating
2 reviews
144 reviews
Brand Name Harley-Davidson KTM
Ex-Showroom Price Rs. 28.03 Lakh Check On Road Price Rs. 3.47 Lakh Check On Road Price
Engine Type Milwaukee-Eight™ 117 Custom Single Cylinder, Liquid Cooled, DOHC, FI Engine
Max Power 104.69 PS @ 5020 rpm 46 PS @ 8500 rpm
Fuel Type Petrol Petrol
Colors
Harley Davidson Fat Boy Colors
KTM 390 Duke R Colors
Wheel Size Front :-457.2 mm,Rear :-457.2 mm Front :-431.8 mm,Rear :-431.8 mm
Wheels Type (Pressed Steel/ Alloy) Cast Aluminum Alloy
ABS Dual Channel Dual Channel
Starting Self Start Only Self Start Only
Speedometer Analogue Digital
EMI
Rs. 76,745 @ 6% (36 months)
Rs. 9,495 @ 6% (36 months)
Insurance Rs. 58,686 Fat Boy Insurance Rs. 22,891 390 Duke R Insurance
Brochure N/A
Download Brochure

Spark Plugs
Not Available
1 Per Cylinder
Valves (per cylinder)
4
4
Claimed Top Speed
177 kmph
167 kmph
Emission Norm Compliance
bs6.2
bs6.2
Engine Type
Milwaukee-Eight™ 117 Custom
Single Cylinder, Liquid Cooled, DOHC, FI Engine
Engine Displacement
1923 cc
398.63 cc
Gear Box
6 Speed
6 Speed
Max Power
104.69 PS @ 5020 rpm
46 PS @ 8500 rpm
Max Torque
168 Nm @ 3000 rpm
39 Nm @ 6500 rpm
Bore
103.5 mm
89 mm
Stroke
114.3 mm
64 mm
Number Of Cylinders
2
1
Drive Type
Chain Drive
Chain Drive
Fuel System
Fuel Injection
Fuel Injection
Fuel Type
Petrol
Petrol
Ignition
Not Available
Contactless, Controlled, Fully Electronic Ignition System With Digital Ignition Timing Adjustment
Compression Ratio
10.3:1
12.71:1

Front Brake
Disc
Disc
Rear Brake
Disc
Disc
Front Caliper
4 Piston
4 Piston
Rear Caliper
4 Piston
2 Piston

Mileage (Overall)
18.18 kmpl
30 kmpl
Average Speed
Not Available
Yes
Fuel Gauge
Digital
Digital

Suspension-Front
Dual-bending valve 49 mm telescopic with aluminum fork triple clamps; dual rate spring; "beer can" covers
5 Click Compression And Rebound Adjustable, Open Cartridge, Wp Apex Usd Forks, 43 mm Diameter
Suspension-Rear
Hidden, free piston, coil-over monoshock; 43mm stroke; hydraulic preload adjustment
Adjustable Wp Apex Monoshock, 5 Step Rebound Damping, 10 Step Preload Adjustable

Front Tyre Pressure (Rider)
Not Available
29 psi
Front Tyre Pressure (Rider and Pillion)
Not Available
29 psi
Rear Tyre Pressure (Rider)
Not Available
32 psi
Rear Tyre Pressure (Rider and Pillion)
Not Available
32 psi
Tyre Size
Front :-160/60-R18, Rear :-240/40-R18
Front :-110/70-17, Rear :-150/60-17
Wheel Size
Front :-457.2 mm,Rear :-457.2 mm
Front :-431.8 mm,Rear :-431.8 mm
Tyre Make
Michelin
Not Available
Tyre Type
Tubeless
Tubeless
Radial Tyre
Yes
Not Available
Wheels Type (Pressed Steel/ Alloy)
Cast Aluminum
Alloy

Dry Weight
304 kg
Not Available
Seat height
675 mm
800 mm
Fuel Tank Reserve Capacity
Not Available
3 L
Engine Oil Capacity
4.7 L
Not Available
Wheelbase
1650 mm
1357 mm
Length
2365 mm
Not Available
Ground Clearance
125 mm
183 mm
Width
965 mm
Not Available
Fuel Tank Capacity
18.9 L
15 L
Kerb Weight
315 Kg
168.3 Kg
Tail Light
LED
LED
Front Brake Size
Not Available
320 mm
Rear Brake Size
Not Available
240 mm

Call/SMS Alerts
Not Available
Yes
USB charging port
Yes
Yes
Headlight
LED
LED
Battery Capacity
Not Available
12V / 8AH

Cruise Control
Yes
Yes
Frame Type
Stiffer Frame
Split - Steel Trellis Frame, Aluminum Casted Sub-Frame
Digital Display Type
Not Available
TFT
Malfunction Indicator
Not Available
Yes
Trip Meter
Digital
Digital
Vehicle Location Tracking
Not Available
Yes
Pillion Seat
Not Available
Yes
Pillion Grab Rail
Not Available
Yes
Calls and Messaging
Not Available
Yes
Navigation assist
Not Available
Yes
Riding Modes
Yes
Track,Rain,Street
Traction Control
Yes
Yes
Kill Switch
Yes
Yes
Low battery alert
Yes
Yes
Brightness Control
Not Available
Yes
No. of Tripmeters
Not Available
2
Engine Temperature Indicator
Not Available
Yes
Rear Footpegs
Yes
Yes
Daytime Running Lamps
Not Available
Yes
Additional Features/Information
Drag-Torque Slip Control System, Hand Controls, Tyre Pressure Monitoring System, Cornering Enhanced Anti-lock Brake System, Cornering Enhanced Traction Control System, Cornering Drag-Torque Slip Control System
Ride By Wire, Supermoto Mode, Track Screen, Quickshifter+, Cornering ABS
Gear Position Indicator
Yes
Yes
ABS Type
Dual Channel
Dual Channel
Side Stand Warning
Yes
Yes
Launch Control
Not Available
Yes
ABS
Dual Channel
Dual Channel
Body Type
Cruiser Bikes
Sports Naked Bikes, Sports Bikes
Body Graphics
Not Available
Yes
Instrument Console Type
Analogue and Digital
Digital
Bluetooth Connectivity
Not Available
Bluetooth
Internet Connectivity
Not Available
Yes
Starting
Self Start Only
Self Start Only
Seat Type
Split
Split
Pass Beam Switch
Yes
Yes
Speedometer
Analogue
Digital
Tachometer
Digital
Digital
Low Fuel Warning Lamp
Yes
Yes
Clock
Yes
Digital
Low Battery Indicator
Yes
Yes
Stepup Seat
Not Available
Yes
Low Oil Indicator
Yes
Yes
Cooling System
Air Cooled
Liquid Cooled
Odometer
Digital
Digital
Navigation
Not Available
Yes
Service Due Indicator
Not Available
Yes
Switchable ABS
Yes
Not Available
Saree Guard
Not Available
Yes
Shift Light
Not Available
Yes
Quick Shifter
Not Available
Yes
Hazard Light Switch
Not Available
Yes

1st Service
Not Available
1000 Kms/45 Days
2nd Service
Not Available
8500 Kms/150 Days
3rd Service
Not Available
16000 Kms/240 Days

Vehicle Warranty
Not Available
2 Years or 30,000 Km
Standard Warranty (Years)
Not Available
2
Standard Warranty (kilometers)
Not Available
30000

Pros and Cons

  • Positives
  • Negatives
KTM 390 Duke R
  • Improved performance means this is the quickest bike in its segment
  • Brakes feel sharp and predictable
  • Adjustable suspension handles bad road well even in its stock setting
  • Lower seat height should make it more accessible to shorter riders
  • Feels super light on its feet and agile when changing directions
  • You can barely feel any engine heat, even in bumper to bumper traffic
  • Motor has become a lot smoother than before
KTM 390 Duke R
  • Some of the panel gaps are a little too pronounced
  • H-rated Metzeler tyres feel a little squiggly when pushing the bike hard and the signature KTM orange colour option looks too garish in this model
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Latest News on Harley Davidson Fat Boy and KTM 390 Duke R

Harley-Davidson Fat Boy Vs KTM 390 Duke R FAQs

Which bike is best between Harley-Davidson Fat Boy vs KTM 390 Duke R?
On the basis of mileage, performance, comfort, maintenance and features user have rated both the bikes equally.
Which bike is cheaper Harley-Davidson Fat Boy vs KTM 390 Duke R?
The KTM 390 Duke R is cheaper than Harley-Davidson Fat Boy by ₹24.56 Lakh.
Which bike offers better performance Harley-Davidson Fat Boy vs KTM 390 Duke R?
For the STD version, 1923 cc Petrol engine of Fat Boy produces 104.69 PS @ 5020 rpm of power and 168 Nm @ 3000 rpm of torque. Whereas for the STD version, 398.63 cc Petrol engine of 390 Duke R produces 46 PS @ 8500 rpm of power and 39 Nm @ 6500 rpm of torque
As per the users experiences in terms of performance both are same.

Images of Harley-Davidson Fat Boy and KTM 390 Duke R

Which one do you like more?
Fat Boy
Fat Boy
390 Duke R
390 Duke R
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