Fiesta Eco Boost - fairly low emissions from 1L engine. Fits a Markbass STD102HF on the back seat, a Markbass Traveller 102P in the boot, two basses in the front seat/footwell and the various bags, mic stands and amp heads fitted in around it all.
I’ve also got a Volvo V70 which obviously takes every bit of gear I’ve ever owned, but in terms of small, efficient and low- emission vehicles, the Fiesta works a treat for me.