This is my own opinion and beauty they say is in the eye of the beholder.
These cars are my personal worst, I have been unfortunate to actually
have owned some of these. So by my own opinion have no taste ;-)

#1 Pontiac Aztec.

I wonder if this is really a car. Everytime I get behind on of these i'm not sure if I should take a picture or grab the barf bag.  What was Pontiac thinking? Maybe these are the same design execs that are in charge of Detroit now. If so Detroit is doomed.

#2 AMC Pacer.

I remember a TV ad were they drove another car inside a Pacer to proved how spacious it was. My thought was.. who cares. it's hideous. Could a car be more round?  I'm not sure a car was ever made that had more car above the axels than this beauty.  If it were a boat They'd be worried about capsizing.

#3 AMC Gremlin.

Aptly named.. it's just looks like a Gremlin. I always thought it was a square going down the road. It reminded me of a Pinto clone. I think this the Pacer Doomed AMC.   Every time I see this picture I think of a work boot... not sure why.

#4 1958 Ford Edsel  

Although well intended my father says this must be on my list. I have to 
admit it's not a nice looking vehicle even for the time. 

#5 Fiat Multipla

I saw this over in Europe, goes to show you Detroit does not have the lock on ugly car design. and to think Fiat owned Ferrari. hmmm..  Now they own Chrysler.. LOL.. maybe they can incorporate the wonderful engineering of the Aries K car into this beauty...

#6 Triumph TR7

I once actually liked this car and then as I got older I said. was I crazy. Who wants to drive a under powered triangle.  I rememebr the popular color was neon green.. WOW.

#7 The Yugo

The Yugo it looked as bad as it was built.. end of story .  

 

#8 Toyota Echo

The worlds tallest thin car. Is this car actually tallet than it is wide. As I get behind one of these on the road I wonder. This is a 
violation of physics I think.  

#9 Plymouth Reliant K Car

Ok I wanted to rank this higher but it's a box on wheels and a lot of cars have that going on. The thing that pulls this into my top ten is the incredibly bad engineering of this car. Let face it Chrysler took us for a ride on this one. They sold millions of these pieces of junk. I actually fell for the sales pitch and owned one of these. What a piece of @#$@%^& . I lived in the frozen tundra and went out in about -20 F to start the car and 3 of the four door handles broke trying to get in the car. One cylinder stopped working on a 4 cylinder engine. The oil pan leaked and I forget the other problems. Oh the heater was useless !!! I had to put cardboard in front of the radiator to get the heater to work to the point a thick jacket was bearable. I'm glad it's not mine anymore. I actually hope they buried it some were and cursed it. No wonder Chrysler is in trouble.

#10 Ford Pinto 

This was round and square at the same time, besides being a fire trap and exploding I just never liked the way it looked.