Cadillac has already confirmed plans to rollout hotter versions of its CT4-V and CT5-V sedans, with the latter hopefully boasted by V-8 power. While many were hopeful Cadillac’s Blackwing V-8 would be under the hood of this hotter CT5-V, it sounds like that isn’t going to happen.

A new report from Car And Driver suggests the hotter CT5-V will be powered by GM’s supercharged 6.2-liter Small Block V-8. Assuming this is true, it basically means Cadillac is carrying forward the CTS-V’s engine into the CT5-V.

To be clear, we’re not complaining. In the CTS-V this engine churned out a healthy 640 horsepower. Given the CT5-V is smaller and assumably GM engineers could improve the engine further, this should be a very capable high performance sedan.

So why is Cadillac using the Small Block over its exclusive Blackwing V-8? Well, the likely reason is the Blackwing doesn’t fit between the strut towers of the CT5. Thus far the Blackwing has only be leveraged in the CT6, which is based on the larger Omega architecture. Given overhead cam engines tend to take up more real estate, it is plausible to assume it would be a very tight fit in the smaller Alpha architecture that underpins the CT4 and CT5.

In addition to the V-8 powered CT5-V, a hotter CT4-V is also expected. Though the CT4-V will likely be powered by a twin-turbocharged V-6 engine, similar to the now defunct ATS-V.