A mechanical deep-dive into the swept volumes and power ratings of India's most popular two- and four-wheelers — from the humble Activa to the mighty Safari.
Before comparing vehicles, understand the four key metrics that define every engine's character and real-world performance on Indian roads.
V = π/4 × bore² × stroke × cylinders
Power = Torque × RPM ÷ 9549
T = F × r (at crankshaft)
SP = Peak Power ÷ Displacement
Basic classification of engines in terms of cc, power (HP), torque and their usual applications.
| Segment | Engine (cc) | Power (HP) | Torque (Nm) | Usual Use | Examples |
|---|---|---|---|---|---|
| Commuter | 97–125 cc | 5–11 HP | 8–11 Nm | Daily city use, fuel efficient, For mileage-not thrills | Hero Splendor, Hero Maestro Edge 125, Honda Activa, Honda Shine |
| Mid Segment | 150–200 cc | 12–20 HP | 12–18 Nm | City + highway balance | Baja Pulsar 150, TVS Apache RTR 160 |
| Premium | 250–350 cc | 20–35 HP | 20–30 Nm | Highway cruising | Royal Enfield Classic 350, KTM Duke 250 |
| Performance | 400+ cc | 40–200+ HP | 35–100+ Nm | High speed / sports riding | Kawasaki Ninja 650, BMW S1000RR |
| Segment | Engine (cc) | Power (HP) | Torque (Nm) | Usual Use | Examples |
|---|---|---|---|---|---|
| Small Cars | 800–1200 cc | 50–90 HP | 70–120 Nm | City driving | Maruti Suzuki Alto, WagonR vxi, Renault Kwid |
| Compact Cars | 1200–1500 cc | 80–120 HP | 110–160 Nm | City + highway cruising | Maruti Suzuki Swift, Honda Amaze |
| SUV / Mid-size | 1500–2500 cc | 100–200 HP | 200–400 Nm | Highway, hills, load | Hyundai Creta, Mahindra Scorpio |
| Luxury | 2000–5000+ cc | 150–500+ HP | 300–800 Nm | Performance + comfort | BMW X5, Audi Q7 |
Key Concept: Higher engine capacity (cc) increases torque due to higher cylinder pressure, and power depends on both torque and engine speed. Thus, cc influences pulling ability, while HP governs speed.
From 97 cc commuters that move millions of Indians daily, to 400 cc performance machines that challenge European sportbikes on specific power output.
| Model | Displacement | Peak Power | Peak Torque | Specific Power | Segment |
|---|---|---|---|---|---|
| Honda Activa 6GAutomatic Scooter | 109.51 cc | 7.79 PS@ 8000 rpm | 9.79 Nm@ 5500 rpm | 0.071 PS/cc | Mass Commuter |
| Hero Splendor PlusCommuter Motorcycle | 97.2 cc | 8.02 PS@ 8000 rpm | 8.05 Nm@ 6000 rpm | 0.082 PS/cc | India's Best Seller |
| Honda CB Shine125cc Commuter | 124.7 cc | 10.74 PS@ 7500 rpm | 10.9 Nm@ 6000 rpm | 0.086 PS/cc | 125cc Segment |
| Bajaj Pulsar 150Sporty Commuter | 149.5 cc | 14.0 PS@ 9000 rpm | 13.25 Nm@ 6500 rpm | 0.094 PS/cc | Entry Performance |
| TVS Apache RTR 160Sports Motorcycle | 159.7 cc | 16.55 PS@ 9000 rpm | 14.73 Nm@ 7250 rpm | 0.104 PS/cc | Track-Inspired |
| Royal Enfield Classic 350Cruiser | 349 cc | 20.2 PS@ 6100 rpm | 27 Nm@ 4000 rpm | 0.058 PS/cc | Low-RPM Torque |
| Royal Enfield HimalayanAdventure Motorcycle | 411 cc | 24.3 PS@ 6500 rpm | 32 Nm@ 4250 rpm | 0.059 PS/cc | Off-Road ADV |
| Bajaj Dominar 400Sport Tourer | 373.3 cc | 40.0 PS@ 8800 rpm | 35 Nm@ 6500 rpm | 0.107 PS/cc | Touring Sport |
| KTM Duke 390Naked Sportbike | 373.2 cc | 43.5 PS@ 9000 rpm | 37 Nm@ 7000 rpm | 0.117 PS/cc | Segment Leader |
The specific power paradox: The Splendor (97 cc) produces more power per cubic centimetre than the Classic 350 — because Royal Enfield's long-stroke motor is tuned for low-RPM torque, not rev-happy output. The KTM Duke 390 leads India's accessible segment at ~0.117 PS/cc, rivalling small-displacement European sportbikes. The Activa — India's best-selling vehicle — makes just 7.79 PS, but its broad, low-RPM torque curve is exactly what stop-and-go city traffic demands.
* All figures are manufacturer-stated, BS6 / OBD-II compliant. Real-world output may vary ±5%. Specific power = peak PS ÷ displacement in cc.
From India's most affordable hatchbacks to turbo SUVs and a premium German benchmark — covering the full spectrum of power and displacement.
| Model | Engine / Displacement | Peak Power | Peak Torque | Specific Power | Fuel |
|---|---|---|---|---|---|
| Maruti Alto K10Hatchback | 1.0L (998 cc)K10C, 3-cylinder | 67 PS@ 6000 rpm | 89 Nm@ 3500 rpm | 67 PS/L | Petrol |
| Maruti Swift / DzireHatchback / Sedan | 1.2L (1197 cc)Z12E, 3-cylinder | 90 PS@ 6000 rpm | 113 Nm@ 4400 rpm | 75 PS/L | Petrol |
| Hyundai Grand i10 NiosHatchback | 1.2L (1197 cc)Kappa, 4-cylinder | 83 PS@ 6000 rpm | 114 Nm@ 4000 rpm | 69 PS/L | Petrol |
| Tata Nexon 1.2TCompact SUV | 1.2L Turbo (1199 cc)Revotron, 3-cylinder | 120 PS@ 5500 rpm | 170 Nm@ 1750 rpm | 100 PS/L | Turbo Petrol |
| Maruti Brezza 1.5Compact SUV | 1.5L (1462 cc)K15C, 4-cylinder | 103 PS@ 6000 rpm | 137 Nm@ 4400 rpm | 70 PS/L | Petrol |
| Hyundai Creta 1.5T-GDiMid-Size SUV | 1.5L Turbo (1482 cc)Smartstream T-GDi | 160 PS@ 6000 rpm | 253 Nm@ 1500 rpm | 107 PS/L | Turbo Petrol |
| Mahindra Thar 2.0TOff-Road SUV | 2.0L Turbo (1997 cc)mStallion, 4-cylinder | 150 PS@ 5000 rpm | 320 Nm@ 1600 rpm | 75 PS/L | Turbo Petrol |
| Tata Safari 2.0 DieselFull-Size SUV | 2.0L Diesel (1956 cc)Kryotec, 4-cylinder | 170 PS@ 3750 rpm | 350 Nm@ 1750 rpm | 87 PS/L | Diesel |
| BMW 3 Series 330iPremium Sedan | 2.0L Turbo (1998 cc)B48, 4-cylinder | 258 PS@ 5200 rpm | 400 Nm@ 1900 rpm | 129 PS/L | Turbo Petrol |
Turbocharged engines dominate specific-output rankings. The Tata Nexon 1.2T produces 100 PS/litre — more power per displacement than the Safari's diesel despite having half the cubic capacity. Diesel engines compensate with massive torque at very low RPM — the Safari delivers 350 Nm at just 1750 rpm, making it far superior for heavy loads and rough terrain. The BMW 330i's 129 PS/litre from a 2.0L engine shows what premium engineering extracts from modest displacement.
* Specific power quoted as PS per litre (industry standard for 4-wheelers). Diesel torque peaks very early, making the numbers deceptively modest despite excellent real-world pulling ability.
Four archetypal segments placed side-by-side — each representing a distinct engineering philosophy and use-case on Indian roads.
A striking observation: the KTM Duke 390 at 43.5 PS makes nearly half the absolute power of a compact turbo SUV — from a single-cylinder motor displacing 373 cc. Yet at ~43.5 PS / 172 kg (0.25 PS/kg), it achieves a better power-to-weight ratio than the BMW 330i (258 PS / ~1650 kg = 0.16 PS/kg). Turbocharging effectively doubles specific output in modern small-displacement car engines, which is why a 1.2T Nexon outperforms a 1.5L naturally aspirated car in peak power despite the smaller displacement.
A scaled comparison of absolute peak power across all vehicles in this guide. Note how car engines start where the largest bikes end.
The KTM Duke 390's 43.5 PS sits at the very start of the 4-wheeler scale where the BMW 330i ends at 258 PS. Yet on power-to-weight ratio, the Duke wins convincingly. This is the core insight of automotive engineering: absolute power is meaningless without context — what effortlessly moves a 172 kg sportbike would barely shift a 1.6-tonne luxury sedan. Displacement and power are tools; weight is the enemy of performance.
* All figures are manufacturer-stated, tested to BS6/OBD-II norms. Power is quoted in metric PS (Pferdestärke). 1 PS = 0.9863 bhp = 0.7355 kW. To compare 2W (PS/cc) and 4W (PS/L) specific power: multiply PS/cc × 1000 to get PS/L. Data reflects 2024–25 model year specifications.