Solved by many: Near Mint, 2nd Edition

[Allemano]

Though spectacular and seen on many car shows it's not a showcar.

[Paul Jaray]

an Etceterini? Like Bandini?

[Carnut]

Though spectacular and seen on many car shows it's not a showcar.

1957 Fiat-Osca 1500?

[Allemano]

Neither an Etceterini nor an OSCA and not from the fifties..
You're still on the wrong track. Again, take a close look to the rear end, Isn't there a strange shape formed by the wire?
Further the entire appearance of that model should make you at least wonder considering the previous guesses...

[Carnut]

I've stared and stared at that rear end but can't quite work out what shape it is..  A roll-bar?    I have been concentrating on the 1960's but just thought that Osca-Fiat seemed to fit the shape well..

I'll have one last go for the moment - could it be an ASA?

[Allemano]

No. I will show you the detail I have in mind after a few more unsuccessful guesses..

[Paul Jaray]

Is it a race car?
Is this a well known car, or something else?

[Allemano]

Is it a race car?
Is this a well known car, or something else?

I'm sure almost all of you know it!

[João]

It´s relative new like a Faralli & Mazzanti Antas ?

[Allemano]

It´s relative new like a Faralli & Mazzanti Antas ?

Have a guess!

[Paul Jaray]

He is right.

[Allemano]

Of course he is! 

It was that (red) fin that I meant.

[Carnut]

Is #18 British?

[Allemano]

Is #18 British?

Yes it is!

[woodinsight]

#18 - Alvis?

[woodinsight]

Is this device American used somewhere in a hostile territory such as Alaska?

[Allemano]

#18 - Alvis?

No.

Is this device American used somewhere in a hostile territory such as Alaska?

American, but not used in Alaska

[Carnut]

#18 - Alvis?

No.

Aston Martin?

[Allemano]

No

[woodinsight]

Bentley?

[Carnut]

Woodinsight has asked my next question so I'll ask a different one instead!
Vauxhall?

[Allemano]

Neither a Bentley nor a Vauxhall.

[Carnut]

Sunbeam?

[Allemano]

No

[woodinsight]

Riley?