<div dir="ltr"><div><div> Copied from <a href="http://www.earlydatsun.com/nissan130mk1.html">http://www.earlydatsun.com/nissan130mk1.html</a>, it looks like the L series was used a few years prior to the U20 making it's debute in the 1967.5 roadster. There was also a L13 & L14 prior to the L16.<br><br></div>Paul<br></div>Ohio<br><div><div><div><br><br><tt> Also introduced at this time was the new L20 1998cc OHC 6cyl.
engine, which produced 123hp. This was Nissan's first overhead cam engine,
with much of the development work having been carried out by Yamaha Motor.
The L series engine was an engineering masterpiece. Powerful and virtually indestructible, it became the cornerstone to Nissan's rapid expansion throughout
the late 1960s and 1970s, and remained the primary engine series used by
Nissan right into the mid-1980s. Datsun 510 and 240Z owners all claim the
L series engine as their own, but the fact remains that the L series engine
was initially designed and built for the 130 series Cedric, it was years
before it was fitted to any other vehicles. The L20 fitted to the Cedric
(later refered to as the L20A, after the introduction of the 4 cylinder
L20B engine) was fitted with two Hitachi side drought carburetors similar
to those used on the Fairlady.</tt><br></div></div></div></div>