They say theres a reason behind everything,heres a few
1)Alfa Romeo

The symbols out here r the coat of arms of the city of Milan & related to the Crusades,hence the cross.The figure being eaten is a child or a Saracen depending on who u listen to.
2)Audi(Latin for 'Hear!')
The 4 ri

ngs of Audi represent the 4 companies of the Auto-Union(i.e. DKW,Horch,Wanderer & Audi)After the war the Audi name disappeared,but was revived in 1965,using the 4 rings as a logo.
3)BMW(Bayerische Motoren Werke)

The BMW roundel is a stylised,rotating airscrew-the blue representing the sky.BMW built military aero engines for the planes that bombed the factories that they now own.
4)Citroen

Andre Citroen started in the motor trade by building gear wheels,& the twin chevrons are meant to represent gear teeth.
5)Ferrari

The prancing horse was originally the emblem of Italian WWI flying ace Francesco Baracca,whosse parents persuaded Ferrari to adopt the symbol of their late son for his racing Alfas.
6)Ford

Mr Fords right hand man,Harold Wills earned money printing business cards in his teens,when Henry was looking for a logo in 1903 he dusted off hiis old John Bull printing set.The type face was the 1 he ussed for his own visiting cards.The ovalll appeared in 1912 & the blues was added for model A in 1927.
7)Fiat

Fiat 1st used the 5-bar logo on the Uno in 1982,but when Fiat design chief Mario Maioli was iving past the Mirafiori factory at night after a power cut he saw the giant Fiat logo on top of the plant & set against the fading light of the sky.He did a quick sketch & thus thew 5-bars represent the spaces he cld see between the letters FIAT.
8)Maserati

The Trident is the traditional symbol of Bologna,where the cars were originally made.
9)Mazda

The 'V' represents out-stretched wings & in Mazdas words-'The creativity,the sense of mission,the gentleness & the flexibility that are Mazda'.
10)Mercedes

The 3-pointed star repressents the domination of land,sea & air.
11)Mitsubishi

The company in 1870 built its 1st ship-the 3 diamonds represent a ships propellers.
12)Peugeot

One of the earliest models of Peugeot was known as a Lion-Peugeot which adopted the lion emblem of the city of Belfort,where it was made.Bartholdi,the sculptor responsible for the statue of liberty in NY also takes credit for Belfort's Lion.
13)Porsche

The Porsche badge is essentially the coat of arms of the city of Stuttgart,which was built on the site of a stud farm-hence the horse.The antlers & the red & blacjk stripes are part oof the arms of the Kingdom of Wurttemberg.
14)Renault

The Renault diamond started out as a bonnetemblem.The horn was placed behind it, & from 1922 the centre of the badge was cut to allow sound to escape.
15)Rover

Rover r folk who rove about,rather like Vikings,hence the Viking ship emblem that has been used on Rovers in various forms.
16)Skoda

The badge is actually a winged arrow with no apparent significance beyond a generic impression of speediness.
17)Subaru

This badge refers to a group of 6 stars,also known by its original Japanese name of Mutsuraboshi.Subaru was the 1st Japanese car company to use a name derived from its own language.
18)Toyota

The Toyota badge comprises of 3 ellipses depicting the heart of the customer,the heart of the product & ever expanding technological advancement & boundless opportunities that lie ahead.
19)Vauxhall

The Griffin-half eagle,half lion was the heraldic device of Fulk le Breant,whose heiress bride had a house in Lambeth,in south London.It became known as Fulk's hall,thennn eventually Vauxhall.Scottish engineer Alexander Wilson founded his company in 1857 & adopted the griffin as his symbol.
20)Volvo

Volvo means 'I Roll'in latin & the arrowed circle is merely the conventional map sign for steel.