London & Colonial believes the RDR will mean advisers need to stop relying on off-the-shelf Sipps.
The firm said it expected many firms would be outsourcing fund selection post-RDR as they focus primarily on giving advice.
This means fund platforms will need to enable better discretionary fund management offering to their services.
It also expects more specialist Sipps to become available which offer more flexibility and exposure to investments outside of fund structures.
There are a wide range of products available through a Sipp including commercial property, unquoted shares, warrants and insurance funds.
{desktop}{/desktop}{mobile}{/mobile}
Adam Wrench, head of product and business development at L&C, said: "Many financial advisers have clients who initially may not need anything other than a Sipp with a simplified investment selection, but whose needs change over time as their wealth grows. In such cases, they may seek more suitable offerings, including wider and specialist investment choices.
"For example, clients who own their business may find it advantageous, tax wise or as an investment, to place their company's premises within their retirement wrapper.
"We believe advisers need a multi-platform pension proposition that has the flexibility to adapt with their clients' needs and has the ability to access a broader range of investments and asset classes, when required. We consider such flexibility is important and aids advisers to satisfy the changing needs of clients."