To be totally honest I believe the 4.0 is a way better engine than the new 3.5. Also I cannot believe it has more hp nor better torque. I own the 2015 and 2016 and I can accelerate faster in the 4.0. . I also noticed better mileage in the 4.0 as the 3.5 is constantly downshifting out of overdrive to speed up so mpg is def not improved in the truck. I get better gas mileage in my 2015 that seems to have more power than the 2016 with 6 gears. Def a disappointment in that area. However everything in the cabin is def an improvement over the 15. Also I would defiantly say the 2016 is a way quieter with less air noise. So tit for tat anyone looking for better gas mileage out of the 3.5 engine with more power and torque. I call Toyota out on it. I would rather have the 4.0 with the six speed transmission than this new 3.5. Just my 2cents.
2016 Tacoma Trd Off-road. (Silver Bullet)
2015 Tacoma Sr5. (Polar Bear)
What are the MPG's your getting with both trucks, also how many miles does your 2016 have on it.