Previously, Previously posted:...... A gasoline powered tow vehicle needs to be at least 5.7 liter."
Yeah, I knew that would get you going. It certainly depends on what you're towing, as you mention. It also depends on what your towing performance expectations are - When I stomp on the gas to pass, I expect it to pass something NOW, not take the next two minutes to do it.
My dual-axle, overbuilt, kinda-heavy, car hauler had a working GVW of about 10,000 lbs. and weighed over twice what Alan's single-axle, aluminum trailer does, but I could haul heavier stuff (like my Daughters Land Rover Discovery, every time it died somewhere - which seemed often, at the time).
My Ford F150 tow vehicle had a 5.4 liter Gas engine. It could haul it OK, but, IMO, passing things took a long time and zero to 70 was most of a mile of Interstate getting there. It was about at it's towed weight limit for any sort of decent performance, PLUS I was getting 8-10 mpg, tops. With the diesel, performance was SO MUCH better, and the towing MPG was a little over 16, BUT diesel fuel is more expensive. After Chris built my trailer, he hauled it for a while with a V-6 Dakota pickup truck, but quickly sold that and went diesel (7.3 liter) just for the torque (and he got around 20mpg, towing).
Sure, you can tow, especially with a car on a tow bar, with a much less powerful engine and even behind a "normal" car - you just have to recognize the tow vehicle's limits and drive accordingly.
As far as the towing experience goes, once you're hooked up and everything's snug and you get used to the bumps and creaks and groans back there and everything settles down, it doesn't matter if you're trailering or towing - the experience is the same with one big, glaring exception: You can not ever back up with a car being flat towed. Lots of nasty stuff might happen if you do. Quickly.
Yes, some people can do it for very short lengths, but they are descended from the Gods of Olympus or Southern Republicans and shouldn't be emulated.
So what'cha do, is carefully scope out around where you're going, to see where you can pull-through without backing up. After your first or second trip this will become instinctual and becomes not-a-big-deal.