3.6 benefits over 2.5 Four cylinders??

17,325

Asked by May 15, 2016 at 11:16 AM about the 2015 Subaru Outback

Question type: General

What are the major benefits or demerits ( poorer handling ?) of the H6 engine.
Is the extra two seconds or less of acceleration really worth the fuel cost.  
And, how much EXTRA passing power do you have ..  

Outside of speedier acceleration or passing on the open road in some cases a
compelling reason for purchasing it.. It also costs more to maintain.  

The 2.5 Four CVT transmission is pretty peppy for its size and once you're up to
speed it's a very efficient power plant.

What do you think??

2 Answers

3,650

The NEWER H6 (3.6L) is 1.5x the 2.5LH4, so operates more smoothly. The additional original cost is not worth it, in my opinion. Its mass adds extra weight, which further compromises the handling of the too-tall OB, but it's a nice addition to the Legacy Sedan. (Still, I'd rather have a G37x for an A4/328/C300 beater.) Because the new H6 required a beefier CVT the preceding 5EAT severely compromised fuel eco by comparison. So I'd NEVER buy the H6 5EAT as it's a real pig. Yet the H6 with a CVT may be playing with fire. Efficient? Sure, but at these prices the G37x is just far more reliable chariot, for example. Back to the OB: yes, the H4 is underpowered, but as fuel prices recover it will be seen as the only prudent choice. The previous 3.0L H6 was made from the smaller 2.0L H4 from the Imps, and was barely torquier than the '06+ 2.5H4, and thus, especially with the EAT, was really a fuelish choice...although owners liked the quieter operation. New car shoppers would be wise to avoid the 3.6H6 in an OB because of substandard handling because of high CoG. I'm not even sure I can accept the lighter 2015+ H4 Limited (importantly with 18" wheels), as the 2013-2014 handle better. Need more coffee....

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17,325

Ernie, you have raised some interesting points. So, the 3.6 , 5EAT is a pig?? I guess it's not optimized as well as the CVT?? I suppose that the. 2.5 H4 with the CVT is more responsive and better fuel economy? One article I read said it takes a "few beats" for the H6 to get going.. Do you really think that the 2.5 H4 is that underpowered?? I don't think it's bad around town at all and once cruising on the highway, seems to keep up fine... Maybe only when I'm pulling the trailer uphill do I really feel it's underpowered. At least with the 2.5 H4, the handling is better than the H6 engine, with the lighter front end. It seems as though your BIGGEST concern about the CVT transmission is with the H6? How does the larger 18 inch wheels afect the acceleration on the H4? Seems like the extra high profile would diminish acceleration performance? Is that true? Let me know, please... Thanks, --Mark

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