Does a larger engine size (litre size) necessarily means a higher horse power and greater acceleration?

Answer 1

By rule of thumb comparing like for like ...yes. However, a F1 engine is 2.4 litre and an Audi A3 is 3.2 and the F1 car will win.

Answer 2

Neither, acceleration and power are different things as Honda keep discovering.
generally a larger engine will produce more torque than a similar but smaller one and torque times revs equals power but the larger one will often not be able to rev as high as the little one, the Triumph Sptfire is a good example, 1300 and 1500 have similar power, but 1500 does it at lower revs.
F1 engines have been mentioned but the 1500cc Turbos of the 1980s were more powerful than the 3000 and now 2400cc engines currently used, and for fastest road cars the turbo Konigseg or what ever is about as fast as the much larger non turbo Mclaren F1, and the V12 TVR was too unreliable to bother with. So really the answer is larger engines usually have better torque and drivability than little ones and all things equal will be faster and accelerate better but all things aint equal.

Answer 3

Depends on the type of engine, and how many mods have been done. But if your talking stock standard, then yes. The bigger the cubic inch (litre) then the bigger the HP. Same goes for acceleration. Unless the car weighs tons, then acceleration may suffer. Gear ratios also play a big part in acceleration, stall converters for off the line snap. But if you have two cars the same basic weight, and in one have a 3.2 litre and the other has a 5.7 litre, the 5.7 will roast the 3.2. These are for petrol engines. Diesel you get more horse but it goes more to torque. Propane, it will make a difference but propane suffers when it comes to raw power. Petrol is the best for raw power. And old muscle car engines are really the best, you can mod them way more than current engines, and they are tougher.

Answer 4

Lots of american cars have big engines, 5l plus, but low compression ratios and low BHP outputs, small engines 2l or less that are supercharged or tubo'ed can easily put out more power. On the acceleration as others have said that depends on the car, sometimes even then a larger engine that produces more power won't result in a faster car, the Porsche 911 in the early 80's moved from 2.7 to 3l but because the 3l engine was heavier the cars are about the same in acceleration.

Answer 5

the larger the liter size the more horse power but that don't equate to more speed and greater acceleration. If you have a small car with a 5.7 it will be faster than a large pickup with the same engine.

Answer 6

If you take the power output of an engine, then in the majority of cases, a larger cubic capacity will result in a more powerful engine, but there are some exceptions to this. An engine will have two points of reference as far as its power output goes, and that is peak BHP and torque.

Torque will allow an engine to exert a fair amount of useable power across a range of engine speeds, where peak BHP may be in and out in a very narrow range of engine speeds.

Acceleration will be dependent on torque figures, BHP figures, and the gearing arrangement and size/weight of the vehicle in question.

It is possible to have something like a truck that could have 750BHP, a torque figure of 900FT/lbs, and accelerate like a snail as a result of its size/weight/gearing, and you would have the situation of a car with less than 50BHP and 75ft/lbs of torque easily out-accelerating that truck as a result of weight/gearing factors.

There are many variables, and it is necessary for vehicles to be compared like-for-like when assessing their abilities in relation to speed and acceleration.

Answer 7

only on power out of crankshaft at wheels other things come in size and weight of vehicle also on age of engine as old engine had large bore so say a 3 litre engine only had say 35hp where as now now a 2.5 litre engine can run as much as 300 to 500 hp with rite parts fuel injection and rite fuel

Answer 8

the honda S2000 is 240hp from a 2.0 naterally asperated. chevy 5.7s were not even close to this in the 80s. there are lots of factors to consider, size is a minimal part of how much power an engine produces. also, i heard once that if you cut your weight down by 1/2, a compeditor would have to increase his horsepower by 4x.
base 2000lb, 100hp
you 1000, 100hp=2000, 400hp.....
i dont know how true that is though

Answer 9

not necessarily, you have to take the weight of the vehicle into consideration, artic lorries have massive engines, very slow acceleration! If you're considering 2 cars same make and model but one with a bigger engine then yes it means more power. but sometimes the type of engine counts. e.g. 1.6litre may not be as fast as a 1.4GTi

Answer 10

No, I could get a 1.3litre engine and bolt on 2 turbo's and have massive amounts of horse power. Another thing to look at is how much torque and engine gives, as this is another big factor in pulling power.