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Old 06-15-2005, 09:46 PM   #1 (permalink)
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Heres my question:

Whats the difference between Rear Front and All wheel drive?

Example:

Rx8 is 197hp, Rear-wheel drive

Mazda6 is 220hp, Front-wheel drive

Lancer Evolution is 276hp, All-wheel drive

Now, where does the Rear/Front/All wheel drive come into play?

Thanks in advance,

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Old 06-15-2005, 10:03 PM   #2 (permalink)
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Maybe I"m totally misunderstand what you're asking, but the RWD/FWD/AWD refers to what wheels drive the car.

In an RX-8 the Rear 2 Wheels power the car. (so the car is being pushed)

In the Mazda6 the Front 2 wheels power the car. (so the car is being pulled)

In the EVO all the wheels power the car. (the car is being both pushed and pulled)
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Old 06-15-2005, 10:07 PM   #3 (permalink)
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How does this affect performance?

Is it better to have rear, front, all?

Pretend there are 2 cars, same weight, same hp and torque. One is rear, and one is front wheel drive. Which would be better?
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Old 06-15-2005, 10:21 PM   #4 (permalink)
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i'd take an awd car anyday, all 4 tire, no traction loss, get off the line a lot quicker, and don't lose as much control, front wheel drive there is torque steer (hit the gas and the wheels want to steer different directions) and wheel hop ( bouncing tires from the spinning). rear wheel drive is what i'd have if i had to choose between front and rear, you lose some control in weather elements, usually muscle cars have rear wheel drive.
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Old 06-15-2005, 10:29 PM   #5 (permalink)
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Depends what you mean by "better".

FWD cars are very predictable in their behavior. It's difficult to make them spin out and they perform very well in winter conditions. So they're, generally, better for cars made for the general populace. BUt, in terms of performance they're weak. When you accelerate, weight goes to the rear of the car and lifts off the front, thereby causing a loss of traction on the front wheels. Also a tire has a finite amount of grip -- it can either use this grip to propel the car or steer the car, it's not good at doing both at the same time, which is what is happening in a FWD car. FWD cars generally suffer from "Understeer" meaning that the car wants to turn slower than you want it too; you turn the wheel, it keeps plowing forward. That's not to say that a FWD car can't be raced, as they can be in the hands of a competent driver, but all else being equal, RWD is preferred for performance purposes.

RWD cars are what the vast majority of sports car are. RWD cars are great for the reasons that FWD cars are not. When you accelerate weight transfers back putting weight on the rear wheels and helping them grip up. You leave your front wheels for steering only making powering out of turn very easily. But RWD cars can be unpredictable in the hands of those not used to them as they often suffer from "Oversteer", where the rear of the car starts spinning around faster than the front, initiating the beginnings of a pin. Spinning out is very easy as the rear of the car gets kind of fish-taily if you're not sure what you're doing.

AWD is also performance-oriented. They're extremely quick off the line handle very well (but not usually as well as RWD cars) and are extremely predictable. But they tend to be a litle 'numb' in driving a bit slow to respond; but tend to suffer from neither over or understeer, which can be a good or bad thing depending on the driver. But they're great for daily-driving purposes as well since they perform well in adverse weather conditions. One big downside to AWD is that the complicated drivetrain system sucks a lot of power to make all the components move (the concept of "drivetrain loss" -- the amount of the engine horsepower it takes just to make all the components move that never gets to the wheels to propel the car) , so a 280hp AWD car might not be as fast as, say, a 240hp RWD car.
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Old 06-15-2005, 10:45 PM   #6 (permalink)
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Quote:
Originally posted by Sigma@Jun 16 2005, 02:29 AM
Depends what you mean by "better".

FWD cars are very predictable in their behavior.* It's difficult to make them spin out and they perform very well in winter conditions.* So they're, generally, better for cars made for the general populace.* BUt, in terms of performance they're weak.* When you accelerate, weight goes to the rear of the car and lifts off the front, thereby causing a loss of traction on the front wheels.* Also a tire has a finite amount of grip -- it can either use this grip to propel the car or steer the car, it's not good at doing both at the same time, which is what is happening in a FWD car.* FWD cars generally* suffer from "Understeer" meaning that the car wants to turn slower than you want it too; you turn the wheel, it keeps plowing forward.* That's not to say that a FWD car can't be raced, as they can be in the hands of a competent driver, but all else being equal, RWD is preferred for performance purposes.

RWD cars are what the vast majority of sports car are.* RWD cars are great for the reasons that FWD cars are not.* When you accelerate weight transfers back putting weight on the rear wheels and helping them grip up.* You leave your front wheels for steering only making powering out of turn very easily.* But RWD cars can be unpredictable in the hands of those not used to them as they often suffer from "Oversteer", where the rear of the car starts spinning around faster than the front, initiating the beginnings of a pin.* Spinning out is very easy as the rear of the car gets kind of fish-taily if you're not sure what you're doing.

AWD is also performance-oriented.* They're extremely quick off the line handle very well (but not usually as well as RWD cars) and are extremely predictable.* But they tend to be a litle 'numb' in driving a bit slow to respond; but tend to suffer from neither over or understeer, which can be a good or bad thing depending on the driver.* But they're great for daily-driving purposes as well since they perform well in adverse weather conditions.* One big downside to AWD is that the complicated drivetrain system sucks a lot of power to make all the components move (the concept of "drivetrain loss" -- the amount of the engine horsepower it takes just to make all the components move that never gets to the wheels to propel the car) , so a 280hp AWD car might not be as fast as, say, a 240hp RWD car.
[snapback]432441[/snapback]
ok much better than my response....i'm used to driving an ls1, i get a lot of wheel spin from the rear tires but i liked it better than my old turbo civic, it was really hard to get traction with the extra power to the front wheels. i have yet to drive an all wheel drive car, but from what i've heard, evos and sti's handle great.
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Old 06-15-2005, 10:56 PM   #7 (permalink)
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Quote:
so a 280hp AWD car might not be as fast as, say, a 240hp RWD car.
(Not sure if I quoted that right)

So wouldn't this mean, the Manual Rx8 would be tough competition against the Lancer Evolution?

And by the way, thanks for your replies.
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Old 06-15-2005, 11:00 PM   #8 (permalink)
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Quote:
Originally posted by adroadster@Jun 16 2005, 02:56 AM
(Not sure if I quoted that right)

So wouldn't this mean, the Manual Rx8 would be tough competition against the Lancer Evolution?

And by the way, thanks for your replies.
[snapback]432454[/snapback]

a lancer evolution would destroy it.

an evo can hang with a stock LS1 (rwd car) which run's 13's stock in the quarter mile

power to weight ratio is also a big factor.
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Old 06-15-2005, 11:02 PM   #9 (permalink)
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Can you explain why?

The manual rx8 is 238 hp (rear wheel)
Evo is 276 hp (all wheel)

(Refer to previous quote I posted)
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Old 06-15-2005, 11:07 PM   #10 (permalink)
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the rx8 is much heavier, then you have to account for hp loss to the wheels, so 238hp is what the engine is rated, but to the wheels you account for a 15% loss. the evo is much lighter, you have the hp loss, but awd will get it going quicker from a dig so it would get off the line much quicker than the rx8. and leaving it. lighter, more hp gets you going quick
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