Difference between ASP.NET MVC 3 and 4? [closed]

Answer 1

MVC 3

1. Integrated Scaffolding system extensible via NuGet
2. HTML 5 enabled project templates
3. Expressive Views including the new Razor View Engine
4. Powerful hooks with Dependency Injection and Global Action Filters
5. Rich JavaScript support with unobtrusive JavaScript, jQuery Validation, and JSON binding

MVC 4

1. ASP.NET Web API
2. Refreshed and modernized default project templates
3. New mobile project template
4. Many new features to support mobile apps
5. Enhanced support for asynchronous methods

Ref : http://dotnet-developers-cafe.blogspot.in/2013/09/difference-between-aspnet-mvc-3-and-mvc.html