78 mm stroke x 96 mm piston= 2258 cc's
As Jimmy and Rick mentioned, changing connecting rod length doesn't change displacement, but it does affect the torque curve, although a lot of experienced engine builders feel .100-.200" either way (remember we're talking about 5 ¼- 5½" center to center lengths) doesn't do enough to really make much difference in a street engine.
THAT said- Type 4 engines are known to be quite torquey (in comparison to Type 1's) and they do use a somewhat shorter (131 mm I believe) vs 137 mm Type 1 rod (with a 69 mm crankshaft and 1300/1500/1600 cc displacement depending on piston size). I'm of the understanding VW's watercooled engines use appreciably shorter rods as well- I believe older Rabbit engines paired 80 mm cranks with 135 mm rods and Porsche used 135 mm rods with 74 mm cranks for all their later 356 and 912 engines. A popular combo in the very late '60's/early '70's was 82 mm cranks ground with Porsche spec rod journals and 356 or 912 rods in Type 1 high performance engines- you had to be careful which rods you used, though, as the earlier (less beefy) 356 rods had a habit of breaking with the longer stroke cranks at higher rpm's and making a real mess!