http://www.awdwiki.com/en/subaru/
Which do you prefer? I haven't seen many MT in OB or Foresters.
There is an interesting article explaining the differences between the differen AWD systems Subaru uses.
Quote:
Which is Better?
Now that brings us to the next point of debate as to which one is better?
So here's an excerpt from an article I found:
(Source: http://www.cars.com/carsapp/cars/?sr...all_wheel.tmpl)
"Simpler AWD systems “bias” the power to the front or the rear in this way and react to slippage when it occurs. Subaru's “continuous” AWD system is this type. More advanced systems are designed to be proactive rather than reactive. For example, Subaru’s “active” AWD is claimed to anticipate and prevent slippage for a seamless driving experience. Audi's quattro and related Volkswagen 4MOTION AWD systems route power based on vehicle dynamics: Rear tires have greater grip during acceleration, so during that action the rear wheels receive more of the engine’s power. In turns, the outside front wheel has the most grip and thus gets the most power, followed by both rear wheels.
With advanced AWD like this available on cars such as the Porsche 911 Carrera 4, it’s clear that four driven wheels are no longer the province of high-ridin’ mud buggies. For surefooted handling during acceleration — even on bone-dry roads — AWD is tough to beat."
As per the author of this article the Continuous AWD system found on Subarus with 5MT and 6MT is a simpler system in that it is more reactive than proactive. Whereas the Active AWD systems (with Variable Transfer Clutch) found on 4EAT Subarus and the VTD (which is an advanced Active AWD system) found on 5EAT Subarus are proactive in predicting wheel slippage conditions and hence react faster. But obviously the Continuous AWD systems have the advantages of being less complex and hence less prone to failures and low repair costs.
So again which system is the best? I would say the order could be as follows:
1. DCCD with Front and Rear LSDs - WRX Sti
2. VTD - 4EAT on WRX and 5EAT on Outback XT, Outback 3.0R and Legacy GT
3. Active AWD with Rear LSD: 4EAT on Outback 2.5i
4. Tie. Depends on what you need more? proactive AWD system or the Rear LSD (if offroading)
• Active AWD without Rear LSD: 4EAT on Impreza 2.5i, Legacy 2.5i and Legacy 2.5i Ltd
• Continuous AWD with Rear LSD: 5MT on WRX, Legacy GT, Outback 2.5i, Outback XT and 6MT on spec.B
5. Continuous AWD without Rear LSD: 5MT on Impreza 2.5i and Legacy 2.5i
Subaru saves its best AWD system for the Impreza WRX Sti which has the DCCD system with front and rear LSDs.
I wasnt aware that the Outback 2.5i has the Rear LSD. Thats an advantage over the Legacy 2.5i.
Which do you prefer? I haven't seen many MT in OB or Foresters.
There is an interesting article explaining the differences between the differen AWD systems Subaru uses.
Quote:
Which is Better?
Now that brings us to the next point of debate as to which one is better?
So here's an excerpt from an article I found:
(Source: http://www.cars.com/carsapp/cars/?sr...all_wheel.tmpl)
"Simpler AWD systems “bias” the power to the front or the rear in this way and react to slippage when it occurs. Subaru's “continuous” AWD system is this type. More advanced systems are designed to be proactive rather than reactive. For example, Subaru’s “active” AWD is claimed to anticipate and prevent slippage for a seamless driving experience. Audi's quattro and related Volkswagen 4MOTION AWD systems route power based on vehicle dynamics: Rear tires have greater grip during acceleration, so during that action the rear wheels receive more of the engine’s power. In turns, the outside front wheel has the most grip and thus gets the most power, followed by both rear wheels.
With advanced AWD like this available on cars such as the Porsche 911 Carrera 4, it’s clear that four driven wheels are no longer the province of high-ridin’ mud buggies. For surefooted handling during acceleration — even on bone-dry roads — AWD is tough to beat."
As per the author of this article the Continuous AWD system found on Subarus with 5MT and 6MT is a simpler system in that it is more reactive than proactive. Whereas the Active AWD systems (with Variable Transfer Clutch) found on 4EAT Subarus and the VTD (which is an advanced Active AWD system) found on 5EAT Subarus are proactive in predicting wheel slippage conditions and hence react faster. But obviously the Continuous AWD systems have the advantages of being less complex and hence less prone to failures and low repair costs.
So again which system is the best? I would say the order could be as follows:
1. DCCD with Front and Rear LSDs - WRX Sti
2. VTD - 4EAT on WRX and 5EAT on Outback XT, Outback 3.0R and Legacy GT
3. Active AWD with Rear LSD: 4EAT on Outback 2.5i
4. Tie. Depends on what you need more? proactive AWD system or the Rear LSD (if offroading)
• Active AWD without Rear LSD: 4EAT on Impreza 2.5i, Legacy 2.5i and Legacy 2.5i Ltd
• Continuous AWD with Rear LSD: 5MT on WRX, Legacy GT, Outback 2.5i, Outback XT and 6MT on spec.B
5. Continuous AWD without Rear LSD: 5MT on Impreza 2.5i and Legacy 2.5i
Subaru saves its best AWD system for the Impreza WRX Sti which has the DCCD system with front and rear LSDs.
I wasnt aware that the Outback 2.5i has the Rear LSD. Thats an advantage over the Legacy 2.5i.
