Brown the ground beef and drain completely. Mix in chili powder and onions and stir 2-3 minutes. Mix tomatoes and V-8 juice in large heavy skillet with cover. Combine browned beef in pan with tomatoes. Simmer, stirring occasionally, for approximately 40 minutes. Add drained and rinsed kidney beans and continue to simmer for 15-20 minutes longer. Cover and let set for up to 1 hour for flavors to blend. Serve with choice of sour cream, cheddar cheese, chopped green onions or white onions and homemade cheese biscuits.