The phrase "little turbo" refers to something that is small but has a lot of power or energy. It's like comparing a small car with a powerful engine to a bigger car with a less powerful one. Full definition
The engine is well tuned and offers good low down performance with very little turbo lag. (overdrive.in)
It is strong all through the rev range, very little turbo lag. (edmunds.com)
This results in little turbo lag, constant power delivery along the rev range, and better fuel efficiency than similarly powered 2.4 L V6 engine due to its small size. (en.m.wikipedia.org)