In the early 90s I had a midnight blue Thunderbird turbo coupe. It had a 4 cylinder engine and, despite its mid-sized car appearance, generally got something close to economy car gas mileage. I could get nearly 500 highway miles on a tank of gas.
But near the bottom of the gas pedal swing was a slight detent where the turbo-charger would kick in. A fraction of a second later, that car behaved as if it had an eight cylinder engine. I'm sure that, for ten or twenty seconds, it lost much of its efficiency but doggone it I never had trouble merging onto the freeway in heavy traffic. I could accelerate from 40 to 80 in just a few seconds (and it cornered like it was on rails).
If you can't tell, I loved that car. And I never once noticed, or worried, that good acceleration took anything away from my excellent fuel economy.