Gruber
Senior Member
- First Name
- Mark
- Joined
- Jan 27, 2018
- Threads
- 2
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- 2,309
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- 1,521
- Location
- TN
- Vehicle(s)
- 2018 Honda Civic Sport Touring; 2009 Honda CR-V EX-L
This discussion is mostly fueled by "mine is better".
A turbo engine will use less fuel in every comparable scenario.
The 2.0L at WOT after the VTEC kicked in, will use more fuel than a 1.5T keeping up head to head with it.
At low rpm the 1.5T will use less gas too, if just driving to remain head to head with the 2.0. Most 1.5T drivers will tend to drive more dynamically and waste some fuel, (because the boost is fun and available) but even then they will win on gas mileage by a little. Of course it is possible to use more fuel, if choosing to drive really "spirited" and leaving the 2.0L behind.
The turbo uses some of the exhaust energy, which goes totally to waste in a NA engine. For this reason, it is impossible for a NA engine of the same power to keep up in fuel economy. In this case, even though the 1.5T has noticeably more top power, and very noticeably more torque available at lower rpm, it still has better fuel economy over the entire range. When driving head to head with a 2L, the fuel economy advantage of the 1.5T will be greater than the EPA rating difference. Numerically, of course, not meaning real money savings, because you can't save a lot off an already low cost.
A turbo engine will use less fuel in every comparable scenario.
The 2.0L at WOT after the VTEC kicked in, will use more fuel than a 1.5T keeping up head to head with it.
At low rpm the 1.5T will use less gas too, if just driving to remain head to head with the 2.0. Most 1.5T drivers will tend to drive more dynamically and waste some fuel, (because the boost is fun and available) but even then they will win on gas mileage by a little. Of course it is possible to use more fuel, if choosing to drive really "spirited" and leaving the 2.0L behind.
The turbo uses some of the exhaust energy, which goes totally to waste in a NA engine. For this reason, it is impossible for a NA engine of the same power to keep up in fuel economy. In this case, even though the 1.5T has noticeably more top power, and very noticeably more torque available at lower rpm, it still has better fuel economy over the entire range. When driving head to head with a 2L, the fuel economy advantage of the 1.5T will be greater than the EPA rating difference. Numerically, of course, not meaning real money savings, because you can't save a lot off an already low cost.
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