15 explainers
Plain-language reference pieces from the MotoSutra desk: what a term on the price sheet means, how a system behaves on an Indian road, and why the brochure number is the number it is.
Reference
Terms, systems and charges that decide a purchase but rarely get explained properly in a brochure.
Guide 4 min
A hybrid is not one technology but three, and they earn their money back in different places. What the badge covers on the cars in our catalogue, how the series-parallel trick works below 40 km/h, and the mileage arithmetic that decides whether one pays for you.
Guide 5 min
Two stars and five stars now cost nearly the same money in the same showroom rows. What Global NCAP, Euro NCAP and Bharat NCAP actually test, why stars are not a percentage, and the long list of crashes no rating covers.
Guide 4 min
No brochure prints it and no showroom quotes it, yet bhp per tonne forecasts how a car actually accelerates better than either of the two numbers it is made from. Here is the arithmetic, done across our catalogue.
Guide 5 min
Our own catalogue records pair claimed figures of 25 kmpl with owner reports of 16-19 in the same car. The gap is not a lie, it is a driving pattern — and most of it can be moved with pressure, planning and the right gear, not additives.
Guide 3 min
Cubic capacity is the oldest shortcut in the showroom and the least reliable spec on the sheet. What displacement physically measures, where the cc-to-pace link still holds, and the three tricks that break it.
Guide 4 min
Two cars can list the same bhp and feel completely different, because power is a rate and the rpm it arrives at is the rest of the sentence. What bhp measures, where brochures pad it, and which part of the band you actually use in India.
Guide 4 min
Every electric listing promises you charge for free by braking. Here is the arithmetic behind the promise, why the recovery figure on the brochure and the one in Bengaluru traffic are different numbers, and what the one-pedal habit is actually worth.
Guide 4 min
Newton-metres are the number showrooms lead with and buyers misread most often. What torque physically is, why the rev band printed beside it matters more than the peak, and what a plateau feels like in third gear.
Guide 5 min
Compressed natural gas is the cheapest way to run a petrol engine in India and the least discussed. Here is how a factory kit works, who actually saves money, and what you pay for it in space, performance and hassle.
Guide 4 min
No shift points, no shift shock — and one strange side effect millions of drivers call a fault. How a continuously variable transmission works, what the rubber-band feeling is, and how the CVT differs from the AMT, the DCT and the torque converter on the same price lists.
Guide 4 min
No clutch, no gearbox, no exhaust. Here is what actually sits between the charging socket and the wheel in the electric cars and scooters on our catalogue, where the single-speed drivetrain runs out of leverage, and which parts genuinely fail.
Guide 5 min
The EV question is not ideological, it is a sum: per-kilometre cost from the battery and the pump, the discount between claimed and real range, the charge-point you actually own, and the purchase premium that has to be eaten by the savings. Here is the working, using figures our catalogue records.
Guide 4 min
Diesel costs more to buy and earns it back per kilometre, so the decision is an odometer question with a crossover point. The engine premium, the real mileage gap and the torque character, worked through the figures our catalogue actually records.
Guide 5 min
Anti-lock brakes buy you the one thing a panic stop actually needs — a steerable car. What the system does mechanically, why the light means you are back to plain drums and physics, and where the entry-level hardware in our catalogue stops short.
Guide 5 min
Lane centring, automatic emergency braking and adaptive cruise are sold as one word with three letters. Here is what the sensors do, where the system gives up, and what to check on a spec sheet before you trust it.