This is because GM has changed its naming convention and the un-hyphenated «ZR1» corresponds with the current rule for
alphanumeric designations.
Actually, they have used a +1
alphanumeric designations for all of the hybrids.
Acura's replacement for the Vigor sedan is the luxury automaker's first conversion to
alphanumeric designations that will find all Acura models referred to by letters and numbers.
In 2004 it was determined that for the time being, future generations of the Discovery would receive
an alphanumeric designation, so the model that followed the Discovery Series 2 was the LR3.
Not exact matches
For the past 22 years, ever since finding the first exoplanets, researchers have generally preferred
alphanumeric scientific
designations blessed by the International Astronomical Union (IAU)-- we're talking exoplanetary handles like UScoCTIO 108b and TrES - 3b.