Would it be okay to use that as a related text ?
The Romantic Period extends from the mid/late 18th century to mid 19th Century.
Tess of the D'Urbervilles appears to miss this period, as it was released in 1891 (I think?), rendering it part of the Victorian era.
Considering the fact that the Board of Studies said in their markers notes last year: "Teachers and students are reminded that suitable related texts should be from or about the time frame specified in the elective rubric.", Tess of the D'Urbervilles is probably not the best text to choose.
EDIT: sorry for gravedigging! I didn't realise how old this post is! My answer is probably useless now anyway...