Here's mine (for the 1938 Series 90 Sixteens):
If you want more than Eight cylinders
... Get Sixteen!
If you seek the utmost in automotive luxury--if you want, for instance, to go beyond eight cylinders, by all means go on up to a Sixteen. No twelve-cylinder car can hope to compare with the Cadillac Sixteen in luxury--yet the Sixteen is actually priced in the twelve-cylinder range. Powered with Cadillac's great new 135-degree V-16 engine--the new Cadillac Sixteens are endowed with the smoothest and most spirited performance known to motoring. Exquisitely beautiful, and styled with impeccable taste--they surpass every tradition in comfort, convenience, and luxury. So--if you want more than eight cylinders, why not get a Sixteen and have...the world's finest motor car?
Cadillac
V-16
POWERED WITH THE REVOLUTIONARY NEW 135-DEGREE V-16 ENGINE