In traditional Internet of Vehicles (IoV) systems, data is susceptible to tampering during the sharing process, undermining the reliability of vehicle communication and decision-making. Additionally, the leakage of sensitive vehicle data may pose significant threats to personal privacy. At present, most IoV systems are built on public blockchains, which tend to be computationally intensive and resource-consuming. To overcome these challenges, this paper proposes a data-sharing scheme for IoV based on a consortium blockchain, aiming to enhance both the quality and security of shared data through a vehicle review model and a dynamic incentive mechanism. In this scheme, vehicle behavior is monitored and evaluated to calculate reputation scores, and high-reputation neighboring vehicles anonymously verify the authenticity of shared data to ensure trustworthiness. The dynamic incentive mechanism motivates vehicles to contribute high-quality data, while the consortium blockchain platform guarantees transparent and immutable recordkeeping, thereby improving system fairness and operational efficiency. Experimental results demonstrate that the proposed scheme effectively ensures data security and credibility while significantly enhancing system performance.