Final answer:
The Whigs and Tories had different attitudes towards parliamentary reform due to their economic and social backgrounds. The Whigs supported reforms to promote economic growth and the interests of the middle class, while the Tories opposed significant reforms.
Step-by-step explanation:
The Whigs and Tories had different attitudes towards the reform of Parliament between 1783 and 1830 due to their different economic and social backgrounds. The Whig Party, mainly comprised of middle-class individuals with strong business interests, supported reforms that would accelerate economic growth and promote the interests of the urban middle class. In contrast, the Tory Party, which consisted of nobles and landowners, opposed significant reforms as they feared losing their influence and power.