What is this called and how much does it cost?

I want to completely redo my speedometer AC stuff and radio right now it's gotten knobs and buttons in the speedometer is A needle I d like it to be all digital what would this be called so I can google it and how much do you think it would cost? How much would it cost for just the speedometer? And how much would it cost altogether thanks I appreciate it oh and in case you need to know I have a 1998 Ford Explorer Thanks:-)

Would a V6 in a smaller car feel the same to drive as a V8 in a larger & heavier car?

I'm a young driver and I've driven a few V6s before such as a Ford Mustang, Suzuki Grand Vitara, and a Ford Explorer. I want to buy a used Land Rover L3 which is a V8 and i was wondering if the power would be way too much for me. Or would it feel pretty much the same because Land Rovers are much larger and heavier than Mustangs and Suzukis?

I don't know much about cars so your answers are greatly appreciated.