Yamaha Aerox 155 vs Bajaj CNG Bike
Prices ex-showroom Delhi, checked 2026-09. On-road and running costs estimated for Delhi.
Yamaha Aerox 155 and Bajaj CNG Bike are from different segments and turn up together on most shortlists. The Aerox 155 costs ₹42,027 more than the CNG Bike, so the question is whether what it adds is worth roughly 40% extra.
The Aerox 155 takes 4 of the 7 categories we score, so this is close and comes down to what you weight. Our overall ratings are 7/10 for the Aerox 155 and 6.5/10 for the CNG Bike.
Category by category
Price
CNG Bike
The CNG Bike starts ₹42,027 lower (₹1,04,237 against ₹1,46,264), about ₹1,330 a month less on a standard loan.
Running cost
CNG Bike
CNG Bike claims 91 kmpl against 40 kmpl. That is roughly ₹13,188 a year in fuel at 30 km a day.
Performance
Aerox 155
Aerox 155 has the better power-to-weight ratio: 117 against 62 bhp per tonne. It will feel quicker with a pillion and on overtakes.
Safety kit
Aerox 155
Aerox 155 adds single-channel abs, front disc brake and traction control that the CNG Bike does not have on any variant.
Features
Aerox 155
Aerox 155 gets bluetooth connectivity, idle start-stop, external fuel filler and under-seat storage.
City manners
Aerox 155
Aerox 155 is 23 kg lighter and lower in the seat (790 mm), which you feel in traffic and when parking.
Warranty
CNG Bike
CNG Bike comes with 5 years of standard warranty against 2 on the Aerox 155.
Which one should you buy?
Buy the Aerox 155 if
- you ride two-up or on highways and want the stronger engine
- you are a new rider or shorter and want the lighter bike
- your priority is performance-focused scooter buyers
- your priority is two-up highway rides
Buy the CNG Bike if
- you want the lower purchase price and EMI
- mileage matters more to you than outright performance
- a longer standard warranty gives you peace of mind
- you live where Bajaj's bigger service network matters
What each really costs
Base variants, Delhi, 30 km a day. Servicing and insurance are class-typical estimates.
| Cost | Aerox 155 | CNG Bike |
|---|---|---|
| Ex-showroom | ₹1,46,264 | ₹1,04,237 |
| On-road, Delhi | ₹1,69,100 | ₹1,19,400 |
| Fuel, 5 years | ₹1,15,235 | ₹49,295 |
| Servicing, 5 years | ₹17,500 | ₹30,000 |
| Insurance renewals | ₹8,116 | ₹5,732 |
| Five-year total | ₹3,09,951 | ₹2,04,427 |
Full specification comparison
Better figure in each row is shown in green.
| Spec | YamahaAerox 155 | BajajCNG Bike |
|---|---|---|
| Price | ||
| Starting ex-showroom | ₹1,46,264 | ₹1,04,237 |
| Rough EMI / month | ₹4,640 | ₹3,310 |
| Engine | ||
| Engine | 155 cc | 125 cc |
| Engine type | 1 Cylinder, Liquid Cooled, 4 Valves | 1 Cylinder, Air Cooled, 2 Valves |
| Power | 14.8 bhp | 9.3 bhp |
| Torque | 13.9 Nm | 9.7 Nm |
| Claimed mileage | 40 kmpl | 91 kmpl |
| Cooling | Liquid-cooled | Air-cooled |
| Transmission | CVT automatic | 5 Speed |
| Electric | ||
| Top speed | 115 km/h | 93 km/h |
| Dimensions | ||
| Kerb weight | 126 kg | 149 kg |
| Fuel tank | 5.5 L | — |
| Seat height | 790 mm | 825 mm |
| Ground clearance | 145 mm | 170 mm |
| Wheelbase | 1350 mm | 1340 mm |
| Length | 1980 mm | — |
| Width | 700 mm | — |
| Height | 1150 mm | — |
| Brakes & suspension | ||
| Front brake | Disc, 230 mm, 1 piston caliper | Drum, 130 mm |
| Rear brake | Drum, 130 mm | Drum, 130 mm |
| ABS / CBS | Single Channel ABS | CBS |
| Front suspension | Telescopic fork | Telescopic Fork |
| Rear suspension | Unit swing | Monoshock Absorber |
| Tyres | ||
| Front tyre | 110/80-14 | 90/80-17 |
| Rear tyre | 140/70-14 | 120/70-16 |
Aerox 155 vs CNG Bike: questions people ask
- Which is cheaper, the Aerox 155 or the CNG Bike?
- The CNG Bike is cheaper by ₹42,027 at the base variant (₹1,04,237 against ₹1,46,264 ex-showroom Delhi).
- Which gives better mileage, the Aerox 155 or the CNG Bike?
- The CNG Bike claims 91 kmpl against 40 kmpl. Real-world figures for both will be lower.
- What is the on-road price difference between the Aerox 155 and CNG Bike in Delhi?
- About ₹49,700: roughly ₹1,69,100 for the Aerox 155 and ₹1,19,400 for the CNG Bike, base variants, including road tax, registration and insurance.
- Which costs less to own over five years?
- Our estimate for five years at 30 km a day in Delhi is ₹3,09,951 for the Aerox 155 and ₹2,04,427 for the CNG Bike, including purchase, fuel, servicing and insurance renewals. The CNG Bike comes out ₹1,05,524 ahead.
